MOGADISHU, Somalia — A suicide truck bomb exploded outside a popular hotel in Somalia’s capital on Saturday, killing at least 23 people and wounding more than 30, and gunfire continued as security forces pursued other attackers inside the building, police said. Two more blasts were heard, one when an attacker detonated a suicide vest.

Speaking by telephone from the scene, Capt. Mohamed Hussein said more than 20 people, including government officials, were thought to be trapped as the extremists holed up on the top floor of the Nasa-Hablod hotel, close to the presidential palace. Three of the five attackers were killed, Hussein said. The others hurled grenades and cut off the building’s electricity as night fell.

Saturday’s blasts came two weeks after more than 350 people were killed in a massive truck bombing on a busy Mogadishu street in the country’s worst-ever attack.

Al-Shabab, Africa’s deadliest Islamic extremist group, quickly claimed responsibility for Saturday’s attack and said its fighters were inside the hotel.

Among the dead were a mother and three children, including a baby, all shot

in the head, Hussein said. Other victims included a senior Somali police colonel, a former lawmaker and a former government minister.

Mohamed Dek Haji said he survived the bombing as he walked beside a parked car that was largely destroyed by the explosion. He said he saw at least three armed men in military uniforms running toward the hotel after the bombing at its gate.

"I think they were al-Shabab fighters who were trying to storm the hotel,” he said.

Witnesses in some previous attacks have said al-Shabab fighters disguised themselves by wearing military uniforms.

Since the blast two weeks ago, President Mohamed Abdullahi Mohamed has sought more support for the fight against the extremist group, vowing a "state of war.”

Abdi Guled is an Associated Press writer.