PUNE: Civil Defence officials on Tuesday started activating the emergency response system by testing some 75 sirens installed across the city.

The Union home ministry has asked all states to conduct mock drills on Wednesday in view of “new and complex threats” that have emerged amid rising tensions with Pakistan following the Pahalgam terror attack.

“After receiving the guidelines regarding the mock drills, we have started testing the sirens….our personnel are visiting each site to verify that sirens are functioning properly,” said Yogesh Pardeshi, divisional warden of the Kothrud division of Civil Defence.