
King Maha Vajiralongkorn will meet families reeling from the tragedy in northeastern Nong Bua Lam Phu province, as will Prime Minister Prayut Chan-Ocha, a government spokesman said.
Thailand has begun mourning one of its deadliest mass killings, with flags on government buildings flying at half-mast.
Former police officer Panya Khamrab stormed the children’s nursery armed with a knife and gun before later killing his wife and child, and taking his own life.
Overnight rescue workers delivered coffins to a hospital at Udon Thani and autopsies are scheduled for Friday morning.
The 34-year-old gunman was a former police sergeant suspended in January and sacked in June for drug use.
Police said he was due to face a drugs trial on Friday.