Bangkok, March 10 -- Thai Prime Minister Paetongtarn Shinawatra has ordered heightened security measures and increased night in the country's deep south following a series of violent attacks in Sungai Kolok, a border city in Narathiwat province, which left two security officers dead and 11 others injured.

The Internal Security Operations Command (ISOC) reported that on the evening of March 8, a group of men dressed in Dawah-style Islamic attire travelled in a pickup truck, threw bombs at the district government office and opened fire on security personnel. They also detonated explosives planted in a car and a motorcycle parked outside the building.

On the same night in neighbouring Pattani province, attackers opened fire on a patrol tea...