Four people including two police officers were killed and several others injured Friday in explosions and shootings in south Thailand as tension there mounted after the brutal murder of two Marines on Wednesday.

Pol Lance-Corporal Somchai Khaisa and Pol Lance-corporal Somkid Ruamthong were killed when a roadside bomb exploded in Narathiwat's Sungai Padi district Friday morning, The Nation newspaper reported Saturday.

The bomb, which was probably detonated by mobile phone, exploded while the officers were on patrol to provide protection to teachers.

Pol Lance-corporal Whichit Maksho was seriously injured in the explosion.

Three soldiers were injured when another bomb exploded two-and- a-half hours later in the same district. They were Command Sgt- Major Chaiwat Pungchareon, Sergeant Nathaporn Sisathan and Sergeant Sirisak Pounmkadam.

In Yala province, a rubber plantation worker was shot dead while leaving a teashop and a construction worker was shot dead while traveling to a work site in Pattani province same day.

Meanwhile, two soldiers were injured in two gun attack in Pattani province Friday.

Source: Xinhua