BOGOTA, Colombia (Reuters) -- Five bombs packed with up to 2.2
                   pounds of dynamite exploded almost simultaneously Thursday night outside
                   banks and a supermarket across Bogota injuring two passers-by and
                   causing widespread damage, police said.

                   No group claimed immediate responsibility for the blasts that rocked largely
                   working-class sectors in the north, northwest and south of the capital.

                   But in the past both National Liberation Army (ELN) guerrillas and a small
                   dissident wing of the now defunct M-19 rebel group have targeted banks to
                   protest what they see as the mismanagement and rampant corruption in
                   Colombia's financial sector.

                   Two bombs detonated outside branches of Bancafe, Colombia's second
                   largest bank, and two more went off outside Granahorrar, a state-run
                   savings and loan. Two pedestrians were injured in the Granahorrar blast.

                   A fifth explosion rocked a supermarket and a branch of Las Villas, a private
                   sector savings and loan run by Colombia's biggest financial magnate, Luis
                   Carlos Sarmiento.

                   Local media reported the total number of injured was 12.

                   "These were all dynamite attacks that occurred more or less simultaneously.
                   Nobody has yet claimed responsibility," a spokesman for Bogota's
                   Metropolitan Police force said.

                   Bombs, ranging from small devices such as those used in Thursday night's
                   attacks to huge car bombs, are not uncommon in the capital. The attacks are
                   usually blamed on urban cells of Marxist rebel groups or on drug traffickers.

                   Colombia's banks are undergoing their worst financial crisis ever amid the
                   deepest recession on record. Both private sector and state-run banks have
                   racked up huge losses and have restricted new credits.

                   A government report issued last month blamed some of the record losses in
                   the banking sector on theft and corruption by bank officials.