Palestinian Prime Minister Salam Fayyad warned on Wednesday that Israeli military operations in the West Bank were hampering his administration’s effort to improve security in the territory.

Earlier in the day, Israeli troops raided Nablus’ city hall, confiscating five computers in what appeared to be part of an ongoing crackdown on institutions Israel thinks are linked to Hamas. Troops have raided and shut down various facilities with links to Hamas in the West Bank city this week.

The operations “undermine grossly our efforts aimed at rebuilding our capacity and re-establishing law and order,” Fayyad told a news conference in the West Bank city of Ramallah with Italian Foreign Minister Franco Frattini.

A strong Palestinian security presence in the West Bank is an integral part of peace talks that resumed last year between Israel and Fayyad’s West Bank government.

Israel is reluctant to rely on a recently beefed-up Palestinian police force to head off attacks on Israel or prevent Hamas from seizing control of the West Bank, as it did the Gaza Strip last year.

The peace talks aim to set up a Palestinian state that would include most of the West Bank. Israel captured the territory in 1967 but has expressed willingness to transfer much of it to Palestinian control.

In the Nablus operation on Wednesday, troops also raided six mosques and seized five buses belonging to schools close to the Islamic Hamas, said deputy mayor Hafez Shaheen. Nablus’ mayor, Adli Yaish, is a Hamas politician who has been imprisoned by Israel.

Nablus businesses planned a general strike Wednesday to protest the crackdown.

The Israeli military had no immediate comment.