Three people were killed and another seriously wounded in four separate attacks in Pattani province since Saturday night.
In Pattani's Nong Chik district, a man was killed in a gun attack while travelling in his car on Sunday.
Police said the man, identified as Makosi Awae, 42, was driving in his BMW along a rural road near Ban Sai Mo in tambon Bang Khao when he was attacked by a group of armed men carrying AK47 and M16 rifles.
Makosi was hit many times in the body. He died on the way to Nong Chik Hospital.
In Pattani's Mayo district, the wife of a border patrol policeman was shot dead while returning home from a market on Sunday morning.
Pol Col Kong-ath Suwankham, the Mayo police chief, said the incident took place at about 11am.
While Nipa Promphet, 52, was returning on a motorcycle to her home in tambon Talokapo in Yaring district she was followed by a group of men in a car on Narathiwat-Pattani Road. One of the men shot her in the head with a pistol. When she fell to the ground, the man fired another shot into her body, killing her on the spot, before fleeing.
Mrs Nipa was the wife of a border patrol police officer attached to BPP Unit 444 in Yaring district.
In Pattani's Yaring district, a deputy village headman suffered gunshot wounds in a suspected insurgent attack early Sunday.
Police said Abdulkordae Hayeesalae, 51, was attacked after he returned home at 3.30am.
The two gunmen shot him three times in the groin area and fled.
The victim's relatives took him to a nearby hospital. He remains in a critical condition.
Pol Maj Gen Ekaphob Prasitwattanachai, chief of the provincial police force, said Mahamalayeng Waedamae, a village headman, 50, was shot dead by suspected militants outside a mosque in Pattani's Sai Buri district.
He was shot three times in the body.
Witnesses told police that the shooting happened when Mahamalayeng was returning home after praying at the mosque. Two gunmen on motorcycle fired at him and fled the scene.
Unrest still continues in the violence-plagued region, after Thailand's National Security Council (NSC) and the Barisan Revolusi Nasional (BRN) separatist group signed an agreement to hold discussions with the aim of creating a favourable environment for promoting peace in the deep South.
The agreement was signed on Feb 28 in Kuala Lumpur.
According to Deep South Watch, which monitors the southern violence, more than 5,000 people have been killed and over 9,000 injured in more than 11,000 incidents, or about 3.5 a day, in the three southernmost provinces and the four districts of Songkhla since the violence erupted afresh in January 2004.