A team from the Anti-Terrorism Squad has been sent to investigate the blast, which took place at Malegaon, a top police official said.
The ATS team was sent to probe the blast at Malegaon's Bhikhu Chowk area late Monday night, Joint Commissioner of Police (ATS) Hemant Karkare said.
Six persons were killed and about 80 injured in the incident, police said.
Curfew was also imposed following the blast and stone-pelting by the crowd assembled at the site, they added.
