A retail bank branch in Mexico City on Wednesday became the latest victim of a bomb attack, which involved a home-made butane-based explosive device, the city authorities said.
The attack, the fourth in about a month, damaged a branch of BBVA Bancomer in western borough Venustiano Carranza, and destroyed two telephone booths in the street close to the bank.
No one was injured in the incident and police are checking closed-circuit television footages to look for clues of the attackers' identity.
On Monday, a similar device exploded in a branch of the Max Mara clothing store in Polanco, a northeastern upscale district of Mexico City, without injuring anyone.
The first attack of this pattern was on Sept. 1 on a bank branch in Tlalpan, also a posh area in the south of the city. The second was on a auto dealership close to Mexico City International Airport.