At least 30 persons have been killed after a gunman opened fire on a daycare facility in Thailand on Thursday, a police spokesperson has confirmed.

Police Major General Achayon Kraithong said the assailant, an ex-police officer, shot and stabbed his victims in Nong Bua Lamphu, northeastern Thailand.

A motive has yet to be determined, although reports suggest the officer had been dismissed recently.

So far, 26 deaths have been confirmed, which include 23 children, two teachers and one police officer, according to a spokesperson for a regional government agency.