NARATHIWAT, April 29 — All routes along the Malaysia-Thailand border area in the districts of Tak Bai, Sungai Golok, and Weng have been temporarily closed following a bomb explosion and shooting incident that injured four police officers.

Chief of Police for Sungai Golok District, Pol. Col. Jadsadavit Inprapan, stated that the road to Sungai Golok from Tak Bai district has been closed for inspection after a bomb disposal squad found scattered nails on the highway.