A blast killed two Mexican soldiers in the second deadly incident this week involving an improvised landmine in a crime-plagued western state, authorities said Wednesday.

According to the El Universal newspaper, the soldiers were trying to deactivate the device when it exploded.

The blast happened late on Tuesday in Buenavista in Michoacan, the state prosecutor’s office said.

A military source who did not want to be named said that troops were looking for similar devices believed to have been planted in the area.