The Mexican government has apologized for a shooting by federal police officers that wounded two CIA operatives last week. The operatives were driving a U.S. embassy vehicle with diplomatic license plates near Mexico City when they came under fire. Twelve Mexican officers have been detained so far. It is unclear if the operatives were deliberately targeted or whether it was a case of mistaken identity. On Tuesday, Mexican President Felipe Calderón apologized to the U.S. government.

Mexican President Felipe Calderón: “I am deeply sorry for the events that took place a couple of days ago in Morelos state. As you know, these events are being deeply investigated with full rigor and severity on behalf of the attorney general’s office in order to separate responsibility in this matter and act in consequence, because we can’t allow these things to happen. Whether it is because of negligence, lack of training, lack of trust or complicity, they can’t happen, and they are being completely investigated with full rigor.”

The United States says the wounded CIA operatives were in Mexico to assist in the fight against drug traffickers. On Tuesday, several Mexican politicians called for an investigation of the CIA’s role in Mexico.