Mexico's state-run Pemex oil monopoly says six explosions believed to be sabotage have damaged oil and natural gas pipelines in Veracruz state.
Officials say at least 21,000 people living near the explosions were evacuated, but there have been no confirmed casualties from the incident.
The Associated Press reports that a secretive leftist rebel group named the People's Revolutionary Army has claimed responsibility for the blasts. The group took credit for similar Pemex pipeline attacks a few months ago.
Also Monday, a truck loaded with chemical fertilizer exploded following a vehicle accident, creating a massive fireball that killed at least 29 people and wounded 150 others.
News reports say the truck collided with another vehicle in the mining state of Coahuila. As onlookers gathered around the crash, the vehicle exploded, killing rescue workers and bystanders.
Some information for this report was provided by AP and Reuters.