Weslaco, Texas — The Federal Bureau of Investigations (FBI) is offering a reward for information that may lead to the arrest of those responsible for a U.S. Consulate attack in Mexico.

Hours before Mexico swore in their new president, Andres Manuel Lopez Obrador on Saturday, the U.S. Consulate in Guadalajara suffered two grenade attacks late Friday night.

The incident prompted a bi-national investigation that includes the FBI and the State Department.

Mexican federal police were seen guarding the consulate building.

The State Department said in a statement that no one was injured and there was minimal damage to the side wall.

The timing and the lack of casualties has led many to speculate that the attack was a message from a cartel to the new Mexican administration and the U.S. government.

Recent focus on border security and the movement of migrant caravans without paid smugglers are believed to be hurting cartel profits, according to security experts.

The FBI announced a reward of $20,000 for information leading to the arrest of the suspects behind the attack.

The consulate in Guadalajara remained closed Monday and resumed operations Tuesday.