Feb. 12 (UPI) -- A teacher who was among three people injured during a hostage situation at her school in southern Thailand has died, provincial officials announced Thursday.

Sasiphat Sinsamosorn was pronounced dead at 2:06 a.m. local Thursday at Hat Yai Hospital, where she was receiving treatment for wounds sustained a day earlier when a gunman allegedly entered Patongprathankiriwat School, in Hat Yai District, located in the southern Thailand province of Songkhla.

Authorities have identified the alleged gunman as a 17-year-old boy. Provincial officials alleged the boy, "acting in a deranged state and armed with a firearm," entered the school at about 4 p.m. Wednesday afternoon.

Preliminary findings show that the suspect had attacked a police officer with a knife, wresting away the government-issued 9mm firearm before entering the school, where he took Sinsamosorn and several students hostage.

Related