GAZA CITY (Ma'an) -- Palestinian factions on Monday condemned the attack on police barracks in the Sinai which killed 15 Egyptian officers.

"Palestinian people reject the suspicious and cowardly act against the Egyptian officers," a statement from Fatah said. The attack only serves the enemies of Egypt and the Palestinians, it added.

Fatah spokesman Fayez Abu Aita called on officials to bring to justice all those involved in the attack by "terrorists."

Earlier, the Popular Front for the Liberation of Palestine issued a statement condemning the attack, saying that Egyptian blood is as valuable as Palestinian blood, and the attack can not be accepted by the Palestinian people.

Gunmen killed at least 15 Egyptian policemen and seized an army tank in the assault on a police station near the border with Israel on Sunday.

Gaza's Hamas rulers condemned the attack, which took place near the border crossing where the Egyptian, Israeli and Gazan frontiers converge.

"Hamas condemns this ugly crime which killed a number of Egyptian soldiers and extends its deep condolences to the families of the victims and to the leadership and the people of Egypt," the Islamist group said in a statement.

Hamas closed the tunnels to Egypt through which it smuggles goods to avoid Israel's blockade. An Egyptian security source said Sunday the Rafah border crossing with Gaza had been closed indefinitely.