Brigadier General Yosef Kuperwasser, Israeli Military Intelligence Research Division head, said PNA chairman Mahmoud Abbas is not showing enough leadership in the fight against terrorism.
Kuperwasser's remarks came amid a flare-up of violence on Monday, during which Islamic Jihad claimed its militants shot dead an Israeli in the West Bank and Israeli soldiers killed a Palestinian near the Gaza-Israel border.
PNA's most important achievement so far is a considerable drop in arms smuggling from Egypt into the Gaza Strip through underground tunnels, Kuperwasser said.
Kuperwasser will accompany Israeli Prime Minister Ariel Sharon to attend a scheduled summit between Sharon and Abbas on Tuesday.
Sharon told visiting US Secretary of State Condoleezza Rice on Sunday that a smooth and successful implementation of the Gaza pullout plan in coordination with the Palestinians will help revive the Mideast peace process.
However, Sharon stressed that this depends on the Palestinians stopping terror, violence and incitement, dismantling and disarming terror groups and implementing needed reforms.
Israel will withdraw all forces and some 9,000 settlers from all 21 settlements in Gaza and four out of 120 in the West Bank in mid- August.