The arrests took place in Qalqilya, Bethlehem, Jenin and Tulkarem, Hamas said in a statement.
The detentions were part of a crackdown staged by PNA against Hamas supporters and organizations in the West Bank, according to the statement.
Last summer, Hamas routed security forces of Palestinian President Mahmoud Abbas, ousted his Fatah movement and seized control of the Gaza Strip. Fatah took control of the West Bank.
In both territories, the two factions cracked down against their dissidents -- Hamas supporters in the West Bank and Fatah people in the Gaza Strip.
So far, Egyptian efforts and Arab initiative have failed to strike a reconciliation between Hamas and Fatah to end the political split.
