Security forces on Monday arrested one of the suspected terrorists involved in a brazen attack on a police training centre in the eastern Pakistani city of Lahore [Images].

Television channels aired footage of a bearded man in his twenties who was nabbed while he was reportedly trying to approach two helicopters being used by security forces for surveillance at the centre.

The helicopters had landed at the centre when the suspected terrorist was nabbed while he was trying to get near them. Officials claimed he had some grenades and spoke Pashto.

The suspect was bundled into a police vehicle and driven away to an undisclosed location for questioning.

Between eight and 14 heavily armed terrorists attacked the police training centre at Manawan on the outskirts of Lahore at 7.30 am.

Reports said at least 22 people were killed and about 90 others injured in the attack though there was no official word on casualties.