Dozens of Israeli occupation tanks entered the Rafah refugee camp before dawn Tuesday, just days after another incursion into the Gaza site left eight dead and more than thousand homeless. On Monday, Palestinian leader Yasser Arafat delivered yet another blow to his new premier, appointing an acting security chief over interim Prime Minister Ahmed Qureia's opposition. Qureia, in office about a week, already has threatened to resign several times because of disputes with Arafat. The latest threat came Sunday, when Qureia said he will not be part of the new government set to form in about three weeks. Qureia's success or failure in office could decide the fate of stalled negotiations with Israel over a U.S.-backed peace plan intended to end three years of violence and create a Palestinian state by 2005. Israeli military sources said Tuesday's operation in the Rafah refugee camp was a continuation of a three-day mission that began Friday, aimed at clearing away tunnels used by Palestinians to smuggle weapons from Egypt. There were no immediate reports of casualties Tuesday. Palestinian witnesses said two columns of armored vehicles entered the Rafah camp from two directions before 4 a.m., heading for a different section of the camp from the one targeted earlier. The first raid, the biggest in Gaza in six months, was accompanied by heavy fighting between soldiers and Palestinian gunmen. Eight Palestinians, including two children, were killed, and dozens were wounded. **Jordanian Troops Kill Two Men as They Attempted to Infiltrate into Israel*** Jordan said Monday that its army killed two armed men and wounded two others as they attempted to infiltrate into Israel at dawn. "The border army patrols spotted the four at dawn as they attempted to infiltrate into Israel," said Information Minister Nabil Sharif. The four men fired at the Jordanian troops in the northern Jordan Valley. Troops returned fire, killing two of the men and injuring the others, said Sharif, according to international news agencies. Sharif added security forces searched the area and discovered machine guns and ammunition. The Jordanian army has opened an investigation into the incident, Sharif said. U.N. officials reported that more than 1,200 Palestinians were left homeless after the first operation. **PHOTO CAPTION*** Supporters of the Hamas burn the flags of Israel and the U.S. during a demonstration at the Rafah refugee camp in the southern Gaza Strip, Monday , Oct. 13, 2003.(AP Photo/Khalil Hamra).