US President Joe Biden said the hostage incident in Colleyville, Texas is an act of terror, "we still do not know all the facts about the motives of the hostage-taker", he added.
The US police revealed that the hostage - taker was a British citizen called Malik Faisal Akram.
Biden praised the security men's role in releasing the hostages.
The hostage-taker was shot dead by FBI officers after taking four people hostage at a synagogue in Texas.