IEDs in Bahrain?

"Seven policemen have been injured in a "terrorist attack" in the Bahraini village of Akr, the country's public security chief has told state media.Gen Tariq al-Hassan said an improvised explosive device was detonated near a police checkpoint late on Monday.
Three of the policemen were injured critically by the blast, he added.
The main Shia opposition group, al-Wefaq, said Akr had been "entirely surrounded by security forces who are imposing collective punishment"...."