Palestinians said holding "ringleaders" of bomb-making network

The Palestinian Authority has so far arrested 20 Hamas activists following the discovery on Monday of an explosives laboratory in Nablus, Israel Radio reported on Wednesday.

It said those arrested by the Palestinians included the "ringleaders" of the network.

The arrests were carried out in Nablus, Ramallah, Bethlehem, and other areas.

Israel is also holding several dozen detainees connected with the network, the radio said.

BBC Monitoring (http://www.monitor.bbc.co.uk), based in Caversham in southern England, selects and translates information from radio, television, press, news agencies and the Internet from 150 countries in more than 70 languages.