ROME — Former Italian prime minister Silvio Berlusconi, who recently tested positive for COVID-19, was admitted to hospital on Thursday evening.

Berlusconi "was hospitalised as a precautionary measure at the San Raffaele Hospital in Milan after the appearance of certain symptoms. The clinical setting does not give cause for concern," his staff said in a statement released on Friday.

The politician revealed he had tested positive for the novel coronavirus on Wednesday and planned to spend his quarantine at his home in Arcore near Milan.

Staff added that the former premier and current president of Forza Italia would be working from home during quarantine, and would continue to contribute to the campaigns of local candidates of his party in local elections scheduled for this month.

His personal doctor, Alberto Zangrillo, said then that the politician was "asymptomatic". Berlusconi had recently returned from a holiday in Sardinia, which saw a spike in COVID-19 cases in August.

Italy, which was the first European country to impose lockdown restrictions, was one of the worst-hit countries on the continent with 272,000 positive cases of coronavirus recorded and more than 35,000 deaths.

A spike in cases in August has been blamed on nightclubs and social gatherings after 600 new infections were recorded on Saturday and almost 800 more on Sunday.

Politicians across the political spectrum in Italy took to Twitter to express their best wishes to Berlusconi, who served as prime minister in four governments and as a member of the European Parliament.

Matteo Salvini, leader of La Lega and former interior minister, tweeted: "Best wishes for a speedy recovery and an affectionate hug to his friend Silvio Berlusconi."

The National Secretary of the governing Democratic Party, Nicola Zingaretti, posted: "I want to wish Silvio Berlusconi a speedy recovery on behalf of the whole community of democrats. He will fight this battle hard too. See you soon!"

Giorgia Melloni, the leader of the Brothers of Italy party, also tweeted: "Best wishes for a speedy recovery from me and from the Brothers of Italy to President Silvio Berlusconi. He has shown that he is a lion many times: we are sure he will brilliantly overcome this too." — Euronews