Thai Police have admitted they may have fired some of the four bullets that hit a doctor taken hostage on Thursday by a double murderer allegedly high on drugs.

Pol Maj Gen Prawud Tawornsiri, the spokesman for National Police Bureau, said deputy chief of metropolitan police Pol Maj Gen Amnuay Nimmanno would head a committee to investigate the incident, in which a policeman and a taxi driver were killed by Thada Inthamas.

Read more: The Nation