Pakistan's former prime minister Imran Khan arrested in Islamabad by dozens of officers

Imran Khan, the former prime minister of Pakistan, has been arrested, a government minister has said, as supporters of the politician are told to "shut down Pakistan".

Mr Khan is said to have appeared in court in Islamabad on corruption charges.

The charge sheet says Mr Khan "is accused of commission of the offence of corruption and corrupt practices under section 9(a) of the National Accountability Ordinance".

Footage online, verified by Sky News, shows Mr Khan being led into an armoured vehicle by security forces.

This escalation is a big next step in the political crisis Pakistan is currently facing with protests taking place in every major city across the country. Videos seen by Sky News in Pakistan, show army bases being broken into by civilians and army vehicles being set alight in Lahore and Rawalpindi. With the public showing their discontent towards the military, it is an incredibly unsettling and unpredictable 12-48 hours in Pakistan, politically and socially.

A 'high-level' meeting of the Pakistan Army Core-Commanders is scheduled to take place this evening, Army sources have confirmed to Sky News, following the widespread protests.

It comes as the Army HQ in Pakistan advised all officers in a memo to exercise "extreme vigilance" and to "stay put in units".

The memo seen by Sky News also tells army officers to return to their bases by moving "under a low profile".

Officials from Mr Khan's Tehreek-e-Insaf party said he is in the custody of the security forces, adding they have complained to the Islamabad High Court, which has now requested a police report about the detention.

Speaking anonymously to the Associated Press, anti-corruption officials said Pakistan's National Accountability Bureau had put out a warrant for Mr Khan's arrest last week in a separate case, but he had not obtained bail.

Anti-corruption officials added Mr Khan will appear before a tribunal later today.

The former leader appeared to record a video from an unknown location this morning, with the caption saying officials were out for his arrest to prevent him from campaigning.

Mr Khan was moved to Rawalpindi near Islamabad, where he was questioned by police and underwent a medical checkup before his tribunal.

The 72-year-old was ousted from power last year, and has spent his time campaigning against his successor, claiming his removal was illegal.

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The country's interior minister Rana Sanaullah said the arrest is related to the money laundering of a property tycoon linked to the UK, and claims Mr Khan's fraud is worth around 5bn rupees (£5.9 million).

Mr Sanaullah added the "corruption" was registered through Mr Khan's wife, and that orders have been given to deal with the politician's supporters, should they "create any law and order situation".

In Karachi, tear gas has been thrown at protesters in an effort to disperse supporters of the former prime minister, while police in Lahore were also trying to move opposition on.

Raoof Hasan, a leader from Mr Khan's party called the arrest "blatant interference in the judicial affairs by the powers-that-be", adding: "We are completely in the dark. He was virtually abducted from the court of law."