A homemade bomb exploded at an office of Myanmar’s state electricity provider on July 16, injuring at least seven people in the latest example of opponents of the military-installed government turning to violence after their peaceful protests were suppressed with deadly force, AP reported.

MRTV reported that four employees of the Electric Power Corp. in Mandalay, the country’s second biggest city, and three other people were injured. Reports from independent media gave slightly different casualty counts and said the injured included customers who had come to pay their bills.

Offices and staff of EPC have been targeted since earlier this month when the government decided to crack down on customers who are not paying their bills by cutting off their service.