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The man arrested in connection with the bombing in Bogota last week targeting former Colombian Interior Minister Fernando Londoño that killed two people and wounded about 50 others is a former FARC guerrilla who laid down his arms as part of a program for members of illegal armed groups to rejoin society, officials said Thursday.

Andres Felipe Rios Giraldo, who was arrested on Wednesday, left the Revolutionary Armed Forces of Colombia, or FARC, in 2006, Colombian Agency for Reintegration, or ACR, director Alejandro Eder said in a statement.

"Later, he joined the Reintegration Program run by the ACR," Eder said, adding that another former rebel was arrested last week for an attack that was foiled on the same day that Londoño was targeted.

Rios was captured by police at a house in Ciudad Bolivar, located in the southern section of Bogota, where bomb-making materials and FARC documents were found.

The former rebel is the only person arrested so far for the bombing, which wounded Londoño and killed his driver and a bodyguard.

Londoño, who served as interior minister from 2002 to 2004 in the administration of Alvaro Uribe, said in a press conference Wednesday that the FARC staged the attack with a limpet bomb.

The bomb destroyed a bus and several other vehicles, and it damaged nearby buildings and businesses.

Londoño's vehicle was going through a busy intersection in the northern section of Bogota, near the financial district, when the bomb exploded.

Jesus Antonio Monroy Alvarez, another former guerrilla, was arrested a few hours earlier in connection with a failed car-bomb attack on the Metropolitan Police headquarters.

The ACR is working with investigators looking into the recent "terrorist incidents" in Bogota, Eder said.

Criminal activities involving those in the social reinsertion program "stigmatize, segregate and exclude many of the demobilized who are in the reintegration process and genuinely seek a second chance at civilian life and legality," Eder said.

President Juan Manuel Santos has said on several occasions that it was not clear who carried out the bombing.

The FARC, Colombia's oldest and largest leftist guerrilla group, is on both the U.S. and EU lists of terrorist groups. EFE