BOGOTA, Colombia A powerful car bomb ripped through a luxury hotel in Colombia's second largest city of Cali on Friday night, hurling shards of broken glass into the lobby and injuring at least 32 people, emergency officials said.

Police and Fire Department officials said there were no confirmed fatalities, but added three victims, including a hotel security guard, were hospitalized in critical condition.

The bomb blew at 7 p.m. local time (0100 GMT), spraying the glass facade of the hotel Torre de Cali into the lobby and shattering windows in the first 20 floors of the 41-story building -- the tallest in the city.

Among the injured were two members of local first division soccer team Caldas, as well as former Colombian National Team coach Javier Alvarez, Reuters quoted police as saying.

Guests were trapped for hours in levels above the flaming ruin of the first floor.

The bomb, built with 110 pounds (50 kilos) of dynamite, exploded inside a stolen blue 1996 Chevrolet pick-up truck, police said.

No one immediately claimed responsibility for the rush-hour attack, which caught the hotel -- the site of one of the city's most fashionable gyms -- at one of its busiest hours.

Colombia is locked in a 37-year-old war pitting leftist rebels, ultra-right paramilitary forces and the army in a conflict that has claimed 40,000 civilian lives in the past decade. But common criminals here are also notorious for their use of violence and a January shopping mall blast in the industrial city of Medellin was widely blamed on local mafia.