1.   A second grenade which successfully exploded blew the first one out of the room where it too exploded, causing the casualties, the radio said.

2.   While electricians worked on the problem Friday night, a switch gear exploded causing no serious injuries but forced postponement of the game.

3.   Several noisy fireworks exploded causing brief panic and police detained one person for picketing.

4.   The grenade bounced off the wall and exploded causing no damage or injuries.