About 30 armed men from a Hamas-led security force entered Gaza City's Al-Azhar University on Saturday and seized 80 bags with chemicals from the agriculture college, the dean said.
It was not immediately clear why the chemicals were taken. The spokesman for Hamas's Executive Force militia was not immediately available for comment.
The dean, Jawad Wadi, said he called the office of the Hamas ruler of Gaza, Ismail Haniyeh, to file a complaint. Haniyeh was deposed as prime minister by PA Chairman Mahmoud Abbas last month, after Hamas seized control of Gaza by force.