Two homemade bombs exploded Monday outside branches of Spanish-owned banks in Mexico City, causing damage but no injuries, Federal District officials told Efe.

The bombs targeted BBVA Bancomer and Santander Mexicano branches, Federal District Attorney's Office spokesmen told Efe.

Three bombs were planted at ATMS outside the branches, but only two exploded, District Attorney Miguel Angel Mancera told MVS radio.

The bombs went off between 2:45 a.m. and 3:15 a.m. at the bank branches in Mexico City's Benito Juarez and Iztacalco districts, Mancera said.

Investigators have contacted the banks to obtain security camera videos, officials said.

"There are indications that it was young people because they left a trail" through the eastern section of Mexico City and the ATMs were near each other, Mancera said.

Investigators are combing the crime scenes for messages from the bombers and to determine the motive for the attacks, which were probably linked to "issues totally unrelated to the country and the city," Mancera said.

Six bombings were carried out in late 2009 in Mexico City.

The 2009 bombings "had to do with international economic matters" or animal rights, the prosecutor said.

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