Mexican President Felipe Calderon on Thursday attended the funeral of some of the victims of Tuesday's airplane crash that killed 14 people, and promised a thorough investigation into the accident.

Mexican Interior Minister Juan Camilo Mourino, 37, died in the crash, along with 13 others.

Calderon - a close friend of Mourino's - and his entire cabinet attended the burial ceremony in the Campo Marte military facility in Mexico City, not far from the site where the Lear Jet 45 crashed.

Calderon praised Mourino for his "political leadership, sensitivity, loyalty and efficiency."

"The regrettable events of November 4 will be throughly cleared up," he said. "I am the first person who is interested in having the truth come out and having the causes of these events clarified."

Mourning with the families of the deceased were members of the business community, and political and trade union leaders.

The black box data recorder recovered on Wednesday was sent to the United States for an evaluation, and the results were expected within a week.

Mourino's coffin was placed alone, ahead of a line of eight others, which included those of four government officials, a military bodyguard, the pilot, co-pilot and an air hostess. All were draped in the Mexican flag.

Five people on the ground at the time of the crash were also killed. The authorities were trying to determine the cause of the crash and ruled out sabotage or a possible attack.

The Lear Jet 45 airplane crashed at 6:45 pm (0045 GMT Wednesday) in Mexico City. The explosion set several vehicles - parked and moving - on fire, although the plane crashed into the ground without hitting any buildings.