Thousands of Egyptians on Friday flocked into the landmark Tahrir Square in downtown Cairo, in a show of anger over the ongoing Israeli assault on the Gaza Strip.

Friday's Tahrir, which last year witnessed the Egyptian people' s victory in ousting the previous leadership, were filled up with young Muslim protesters like Ahmed Abdallah.

"We are here to condemn the aggression on Gaza, and to show our support to the Palestinians," the young protester told Xinhua.

Over 20 Palestinians, including the commander of Hamas' military wing Ahmed al-Jaabari, have been killed in the three-day Israeli military operation in Gaza.

"We want a decisive action from our president, even if it will lead us to cut the relations with Israel," Abdallah said, calling on Egypt's new leadership to act immediately.

Hours before the protest, President Mohamed Morsi and Prime Minister Hisham Qandil both denounced the Israeli attack, calling it a "barefaced" aggression against human rights.

Showing a severe and tough tone on the airstrike, the first civil-elected Egyptian president has been trying to take a sharply different attitude toward Israel compared with his predecessor Hosni Mubarak.

"I'm warning the aggressors on Gaza, they can't have any power over the strip," Morsi said in a statement after the Friday prayer, stressing that "Cairo won't leave Gaza alone, and I'm speaking on behalf of all Egyptian people that Egypt now is different than before."

Backed by the powerful Muslim Brotherhood (MB), Morsi is trying to show more support to Hamas who is an offshoot of the MB.

Utilizing last years' turmoil in the whole region, Hamas has grown its muscle by smuggling weapons through tunnels linking Gaza and Egypt's Sinai.

But how it could eventually rival with Israel's "Operation Pillar of Defense," which was launched Wednesday, and how Egypt would act in dealing with the latest wave of hostilities between Hamas and Israel remain open questions.

Rushed by anger, some protesters also ran to the front door of the Arab League (AL), located hundreds meters away from Tahrir, urging the regional body to do something to relief the pain of the Gazan population.

"We want a decisive action from the Arab League, not just holding meetings like before," said Noha Hussein, a 30 year-old protester. Hussein is possibly speaking of an emergency ministerial meeting of Arab foreign ministers slated for Saturday.

"We want all the Arab countries stand by the Palestine side, working together to urge the United States to interfere and prevent the Israeli aggression in Gaza," said Hussein.