The attack in the eastern Pakistani city of Lahore killed at 10 people, police told CNN.

Some local media placed the number as high as 20, adding that dozens of others had been wounded in the attack at the school in the Manawan area of the city. About 400 officers train at the facility.

Lahore is the same city where, earlier this month, gunmen opened fire on a bus carrying members of the Sri Lankan national cricket team on their way to a stadium for a match.

In Monday’s incident, about 12 to 15 attackers — some in police uniform — hurled grenades, then stormed the compound and opened fire, police said.

More than an hour later, several attackers were holed up inside, trading gun fire with police.

Pakistan’s Geo-TV, a CNN affiliate, showed uniformed officers cowering and running for cover as a series of gunshots rang out. At least three were shown sprawled on the ground.

Soon afterward, members of the Pakistan Rangers paramilitary force descended upon the area in full force. A crowd that had gathered outside cheered them on with shouts of “Pakistan Zindabad, Lahore Zindabad” (”Long live Pakistan, Long live Lahore”) and “Allah-u Akbar” (”God is Great”).

The attack on the Sri Lankan national cricket team took place on March 10 when the players were on their way to a stadium for a match.

The well-coordinated attack wounded at least eight members of the team and killed a driver and six Pakistani police officers.

Source: The CNN Wire