Chandigarh, April 9 -- Sixteen grenade attacks in the past seven months in Punjab have kept the cops on their toes giving the opposition a handle to slam the Aam Aadmi Party government over the law and order situation in the border state.

Of the sixteen attacks, 11 have been on police installations.

Although there has been no loss of life or injury in these attacks, however, the frequency and no let-up in the incidents have emerged as a major concern for Punjab Police.

Almost all the cases, barring the April 2 attack on the Badshahpur police post in Patiala, have been solved with police managing to arrest the perpetrators and identify the modules being operated from foreign shores.

The series of blasts started in September from Chandi...