Investigators probing a plane crash that killed Mexico's interior minister have found no indications so far suggesting sabotage or foul play, Communications Minister Luis Tellez said on Wednesday according to Reuters. Interior Minister Juan Camilo Mourino, a close ally of President Felipe Calderon and effectively the number two in his government, died on Tuesday when a small government plane crashed killing all eight aboard. "So far, we have not detected any indications that suggest a hypothesis other than that it was an accident," Tellez said. Mourino was in charge of internal security in a country waging a bloody battle against drug cartels. Jose Luis Santiago Vasconcelos, the deputy attorney general until recently and a key figure in the drug war, also died.