Thursday morning a team of the National Bomb Data Centre (NBDC) led by a lieutenant colonel visited the blast spot outside McDonald's restaurant on Jangli Maharaj road. The team collected samples of the explosive that that had gone off outside the restaurant.

Preliminary investigations reveal that the explosives contained ammonia and a sticky substance which was detonated using a detonator.

Soon after the NBDC team left, a team of police officials collected the bicycles and dustbins in an investigation van. The bicycles and dustbins would be part of the material evidence, said a police official.

The entire Jangli Maharaj street, a plush locality in Pune, which was cordoned off till morning was later opened for traffic.