The arrests were made in villages and were related to alleged acts of violence since late February, said a police statement carried late on Saturday by BNA state news agency.
In one of the arrests, police detained six people suspected of participating in a March 7 “attack” on police patrols in the village of Maqaba, west of the capital Manama, it said, adding security forces were still searching for other suspects.
Others were arrested over alleged attacks on police with petrol bombs and metal rods.
Police also arrested two people suspected of blocking roads and setting tyres ablaze in the area of Dair, close the airport, on April 14, when demonstrations intensified against Bahrain hosting the Formula One Grand Prix race on April 21. It was unclear when all of the arrests were made.
Al Wefaq, the main opposition formation, said on Saturday that police arrested 14 people during raids on Thursday and Friday.
Youths frequently clash with police in villages surrounding Manama. In some cases they hurl petrol bombs and burn tyres.
Police fired tear gas to disperse them. The country was rocked by a month-long uprising in 2011.
The UN torture investigator has said Bahrain effectively cancelled a trip he had set for May 8-15.
Reports also said the government had taken steps to address the alleged brutality of security forces by dismissing those responsible and introducing cameras at police stations to monitor abuses.
