Italian Prime Minister Silvio Berlusconi is due to leave hospital later today after spending his fourth night under observation.

The 73-year-old is believed to have suffered a fractured his nose and two broken teeth after being struck by a souvenir model cathedral while greeting supporters in Milan on Sunday night.

Doctors claim the Italian Prime Minister Berlusconi  is still in pain and struggling to eat properly.

He is expected to be discharged this afternoon but has been urged to scale down public appearances for at least the next two weeks.

A 42-year-old man with a history of mental illness has been arrested in connection with the assault on Mr Berlusconi.

On Wednesday another man was arrested outside the hospital room where the Italian PM is receiving treatment.

Berlusconi who was struck on the face with a statue of the Milan cathedral thrown by Massimo Tartaglia, a 42-year-old man with an alleged history of psychological problems.

See the video of Massimo Tartaglia attacking Silvio Berlusconi

Police announced that a 26 year old man took the elevator to the seventh floor and tried to enter the room of Berlusconi while in recovery from his facial wounds that he received in the attack.

News reports described the man as apparently mentally unstable. He was not reported to be carrying weapons or dangerous objects and had just wanted to talk to Mr. Berlusconi.

Over the past year, political passions have coursed through the nation with unusual intensity as the billionaire prime minister faced several corruption trials and his personal life came under scrutiny. His wife, Veronica Lario, announced that she was divorcing him and accused him of conducting relationships with young women.

The emotions have spilled over onto the streets and into cyberspace with groups on Facebook supporting the attack on Mr. Berlusconi.

See the full video of thr incident bellow