Carrying Turkish flags, some 100 protesters tried to force their way into the building and threw stones at its front windows before riot police finally arrived, the paper said in a statement on its website.

The protesters, who accuse the newspaper of misquoting a television interview by Erdogan, had already staged a similar attack late on Sunday.

The assaults came after dozens of Turkish soldiers and police were killed in attacks blamed on Kurdistan Workers Party (PKK) militants in the last days.

"The government should provide security in a democracy," Hurriyet quoted its editor-in-chief Sedat Ergin as saying, lambasting Turkey's leadership for failing to condemn the first attacks on the paper.

"I am not sure if I will be able to feel secure when I enter this building tomorrow as Hurriyet's editor-in-chief."

Commenting on recent unrest in Turkey, Erdogan said Sunday it would be different if people had voted in 400 deputies from a single party in June 7 elections to help him change the constitution.

"If a party had got 400 seats in the elections and reached the required number in parliament to change the constitution, the situation would be different," he said in a live interview with pro-government A-Haber channel.

Hurriyet suggested in a tweet that his statements were a reference to the latest attacks in Turkey, implying Erdogan said the unrest would not have happened if the 400 mandates had been won.

The president has in the past repeatedly criticised the Dogan Media Group which owns Hurriyet and does not always follow the government line.

The attack on the newspaper comes amid growing concern over press freedoms in Turkey and the use of the courts by the president to pursue journalists who criticise him.