21.   The other two flanks face the Jaffna Lagoon and the Indian Ocean, which navy boats are patrolling to block escape by guerrillas.

22.   The planes dropped depth charges to block its escape, the office said.

23.   The plant was not designed to block the escape of radiation, company officials said.

24.   The water rushed into the area where the miners were working and blocked their escape, the Xinhua News Agency reported late Friday.

25.   Several guards blocked their escape with an intense gun battle that lasted more than an hour, killing the four and injuring five others, police said.