It came as a surprise to the global shipping industry as worldwide patrols had suppressed pirate hijackings for several years.
In October, the United Nations warned that the situation remained fragile, and Somali pirates still "possess the intent and capability to resume attacks".
Pirates do not normally kill hostages unless they come under attack.
An EU NAVFOR photo showing the Aris 13 being held at anchor off the northern coast of Puntland, Somalia, March 14, 2017.
The tanker sent a distress signal on Monday evening, reporting that it was being approached by high speed boats.
An official based in the Middle East with knowledge of the incident told the AP that no ransom demand had been made.
There are thought to be eight people on board the Sri Lankan boat, alongside 12,000 tonnes of cargo.
The armed men were demanding a ransom for the ship's release and were holding the crew captive, the European Union anti-piracy operation off Somalia said late Tuesday after making contact with the ship's master.
"In case this is true", he said, "we will probably be asking for a heavy-handed interference from USA forces for their release". It said it is seeking to help ensure the crew's "safety and welfare". After the vessel was hijacked, the pirates turned off the AIS and altered course for the Somali port town of Alula.
"The pirates never went away, they were just doing other forms of crime".
The merchant ship was intercepted while en route to Mogadishu, the Somali capital, from Djibouti, and was diverted toward Alula, a port in the semiautonomousPuntland region in northeastern Somalia, Ali Shire Mohamud Osman, the district commissioner in Alula, said in a telephone interview.
Piracy off Somalia's coast was once a serious threat to the global shipping industry. "Fish is one answer", he said, referring to the drought that Somalia recently declared a national disaster.
"Merchant shipping should continue to take protective measures against possible piracy attacks in the Gulf of Aden and the western Indian Ocean through diligent application of IMO guidance and Best Management Practices".
Salad Nur, an elder from Putland, Somalia, told the Associated Press that local fishermen and former pirates were behind the hijack. They take boatloads of people to Yemen and return with weapons, he said.
Worryingly, the factors that drove many Somali coastal fishermen to become pirates almost a decade ago are still there. Phil Dierking adapted it for VOA Learning English. It left the country's coast line vulnerable and became a hot spot for illegal fishing and the dumping of toxic waste, the reportsays.
Some residents in the pre-evacuation zone in the Highland neighborhood were watching the fire from Eben G. Wagner said Sunday that evacuation orders for residents of 426 homes will remain in place overnight.
He did not, however, address Netanyahu's warnings or suggest the new broadcaster would not start broadcasting by the launch date. Kahlon heads the Kulanu party which, with 10 seats in parliament, is a crucial part of Netanyahu's government.
Police have also secured an address on Queeston Street from where a child was found in medical distress and taken to the hospital. Police later said they believe the victim was targeted but were still trying to determine the motive for the attack.
The news agency added that Kim Jong Un studied the engine's technical specifications ahead of the test and then guided the test. During his visit to Seoul, Tillerson admitted that Washington's "strategic patience" policy toward Pyongyang was over.
When closest rival Lara Gut of Switzerland tore her ACL in February, the overall title appeared all but inevitable for Shiffrin. She said that early in the season, she had a good feeling in her skiing, but lost it before World Championships.
He even staked Special Agent Aaron "Hotch" Hotchner's son, which forced him to send himself into the witness protection program. The " Criminal Minds " team in season 12 now features Joe Mantegna , Paget Brewster, Matthew Gray Gubler, A.J.
The official San Antonio Spurs Twitter Page is providing the Live Score of this match and also, other Spurs games. According to OddsShark.com, the Grizzlies will be getting 3.5 points at home from the visiting Spurs.
Super Mario Run has a final date to enter Android
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Matthew Perry once beat up Justin Trudeau
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Cincinnati beats Kansas State 75-61 in South Region
The Wildcats earned their first NCAA tournament victory under Bruce Weber on Tuesday when they defeated Wake Forest 95-88. He's an elite defender and rebounder and can carry the offensive load if Caupain or Washington have a bad day.
BSF man opens fire, three killed and two injured
The IPFT and INPT have demanded a judicial probe into the killings and compensation of ₹25 lakh each to the victims' families. Sensing their life in danger, the BSF personnel fired in self-defence, in which three smugglers died.
Trump did not refuse to shake Merkel's hand
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Nintendo plans to double Switch production for coming year
The customer enthusiasm and response we have seen so far has been incredible as we continue to sell through our supply of systems. According to The Wall Street Journal , Nintendo is rising up the production from initial 8 million to around 16 million now.
Lavallee takes second at NCAA wrestling championships
Joseph's victory provided one of the night's most thrilling moments, when he pinned two-time NCAA champion Isaiah Martinez of IL . Nickal won the 2017 Gorriaran Award, which is given annually to the wrestler with the most falls in least amount of time.