1.   A travel ban had been imposed on all opposition members of parliament and other government critics after the grenade incident.

2.   No one was hurt in the grenade incident, which the opposition charged was staged as a pretext for cracking down on dissent.

3.   Police have been investigating both the anonymous telephone threat and the grenade incident but did not want to comment Thursday.

4.   Police violence against the largely peaceful protesters began the day after the grenade incident.

5.   It was the second grenade incident in two days.