Gunmen killed 26 people, including Kenyans, Americans, a Briton and Tanzanians, when they stormed a hotel in Somalia’s southern port city of Kismayo, a regional state president said on Saturday, the deadliest day in the city since insurgents were driven out in 2012.

A car bomb exploded at the hotel where local elders and lawmakers were having a meeting on Friday night, and then three gunmen stormed in, police said. It took 11 hours before security forces ended the overnight attack, police officer Major Mohamed Abdi told Reuters.

The dead included a presidential candidate for August’s regional elections, Jubbaland state president Ahmed Mohamed Madobe said in a statement. At least two journalists and a UN agency staff member were also reported to have been killed.

Al Qaida-linked Islamist group al Shabaab, which is trying to topple Somalia’s weak UN-backed government, immediately claimed responsibility for the attack.

Abdiasis Abu Musab, the group’s military operation spokesman said on Saturday they had killed 30 people and four of its fighters were also dead.

Al Shabaab and government officials tend to give differing casualty numbers for attacks.

Regional president Madobe said that three Kenyans, one Briton, two Americans and three Tanzanians were among those killed.

“Among the dead was also a Jubbaland presidential candidate named Shuuriye. Four militants attacked the hotel. One of them was the suicide car bomber, two were shot dead and one was captured alive by Jubbaland security forces,” he said.

He said 56 people were wounded in the attack, including two Chinese citizens.

Police had said earlier all the attackers had been killed.

Kismayo resident Osman Nur told Reuters that the explosion had destroyed huge parts of the hotel and nearby businesses and security forces were deployed all over the city.

Another anguished resident said she had lost relatives in the attack. “I have been looking for the whereabouts of my nephew who worked at the hotel. I got his dead body this morning and have just buried him,” Halima Nur, a mother of four, told Reuters by phone.

“And this afternoon I will attend the burial of other relatives.”

Jubbaland’s minister of planning, Just Aw Hersi, confirmed the deaths of several prominent Somalis on Twitter. He said some of the foreigners also held dual Somali citizenship.

“We admit, we are heartbroken by their sudden violent deaths. But rest assured, we are also as mad as hell because of it,” he tweeted. The Somalia office of the UN’s International Organisation for Migration said one of its local staff members, Abdifatah Mohamed, was among those killed.