Two senior leaders of Imran Khan's party were arrested on Friday as the Pakistan government launched a crackdown on the opposition party amidst the worsening political turmoil in the country following the former prime minister's arrest in a corruption case.

In a major relief for Imran Khan, Pakistan's Supreme Court on Thursday declared the former prime minister's arrest "illegal" and ordered his immediate release after he was produced before a bench on its orders.

A van that was transporting oxygen tanks to a nearby medical facility exploded in the centre of the Italian city of Milan on Thursday, forcing the evacuation of a school and residential apartment buildings. The driver suffered minor injuries.

An earthquake shook Japan's capital, Tokyo, and surrounding areas on Thursday, injuring several people and causing minor damage, officials and media said.

Pakistan's former foreign minister Shah Mehmood Qureshi, a close aide of ousted prime minister Imran Khan, was arrested by police on Thursday, amid worsening political turmoil that has left at least eight people dead and led to the deployment of the army in the country's capital and three provinces.

Washington: President Joe Biden will host Prime Minister Narendra Modi for an Official State Visit to the United States, which will include a state dinner, on June 22, the White House announced on Wednesday.

Former Pakistan prime minister Imran Khan, who was arrested dramatically on Tuesday in a corruption case, is likely to remain in the custody of the country's anti-graft agency for "four to five days" and is expected to be presented before an accountability court, a media report said on Wednesday.

Pakistan's former prime minister Imran Khan was on Tuesday arrested by paramilitary Rangers while he was present at the Islamabad High Court for the hearing of a corruption case, his party said.