AM-Olympics Explosion, 2nd Add,0066

URGENT

ATLANTA: blocks away

Buck Boyd, who said he was 20 feet from the explosion, said he saw three people lying on the ground. They were bleeding and appeared to be seriously hurt, he said.

Boyd said the explosion happened at a sound and lighting tower at the open-air venue, which is used for concerts to coincide with the Olympic Games.

``I thought it was fireworks, like a big boom, and I saw three guys laying in the street,'' said Terry Tyson, who witnessed the explosion. ``They all had leg injuries. Blood was running down the street. it was horrible.''

AP-WS-07-27-96 0147EDT