The southernmost part of Thailand's rail system was shut down Wednesday after two bombs damaged the tracks, while suspected Muslim insurgents shot dead two policemen riding a motorcycle.
Police said the bombs were detonated in Narathiwat province on a section of the line leading to the town of Sungai Kolok on the border with Malaysia. Repairs were still being done Wednesday afternoon.
There were no casualties and the perpetrators were not identified. Thailand's three southernmost provinces of Narathiwat, Pattani and Yala have been wracked by violence, with more than 4,300 people killed since an Islamist insurgency flared in 2004.
Drive-by shootings and roadside bombings are common.
Insurgents were believed responsible for the killings of two policemen Wednesday afternoon in Pattani province.
Police Col. Chonvee Chavarerk said Sgt.-Maj. Narin Hatre, 39, and Sgt.-Maj. Noppadol Man-ah, 38, were riding a motorcycle back from a songbird competition when two gunmen on the back of a pickup truck opened fire with M16 assault rifles, killing both.
On Monday, five teachers and two defense volunteers in Yala province were wounded by a roadside bomb as they were going to school.
The insurgents inside Thailand rarely make public statements, but are thought to be fighting for an independent Muslim state in the predominantly Buddhist nation. Their attacks target symbols of the state, including soldiers, government-run offices and businesses, as well as civilians and Buddhist monks.
The government has said it will not negotiate with the insurgents.