Members of the Group of Seven wealthy nations on Sunday announced a ban on imports of Russian gold as the G7 summit in the Bavarian Alps kicked off under the shadow of the war in Ukraine and consequences ranging from energy shortages to a food crisis.

The move by Britain, the United States, Japan and Canada is part of efforts to tighten the sanctions squeeze on Moscow and cut off its means of financing the invasion of Ukraine more than four months into a conflict Russian President Vladimir Putin calls a special military operation, Reuters reported.

“The measures we have announced today will directly hit Russian oligarchs and strike at the heart of Putin’s war machine,” British Prime Minister Boris Johnson said in a statement.

“We need to starve the Putin regime of its funding. The UK and our allies are doing just that.”

A senior U.S. administration representative said the G7 would make an official announcement on the gold import ban on Tuesday, Reuters reported.

“This is a key export, a key source of revenue for Russia in terms of their ability to transact with the global financial system,” the U.S. official said.

Russian gold exports were worth $15.45 billion last year and wealthy Russians have been buying bullion to reduce the financial impact of Western sanctions, the British government said.

As well as the gold import ban, G7 leaders were also having “really constructive” talks on a possible price cap on Russian oil imports, a German government source said.

The three-day summit takes place against an even darker backdrop than last year, when British, Canadian, French, German, Italian, Japanese and U.S. leaders met for the first time since the start of the COVID-19 pandemic.

Soaring global energy and food prices are hitting economic growth in the wake of the conflict in Ukraine, with the United Nations warning of an “unprecedented global hunger crisis”.

Two people were killed and 14 injured on Saturday in a shooting at a nightclub and in nearby streets Norway’s capital Oslo, according to reports.

A suspect believed to be the sole perpetrator was arrested, police said.

The crime scene extended from the London Pub via a neighbouring club and onwards to a nearby street where the suspect was apprehended a few minutes after the shooting began in the early hours of Saturday, police spokesman Tore Barstad told newspaper Aftenposten.

The London Pub is a popular gay bar and nightclub in the centre of Oslo.

“I saw a man arrive with a bag, he picked up a gun and started to shoot,” journalist Olav Roenneberg of public broadcaster NRK reported.

The motive behind the attack was not immediately clear.

Oslo is due to hold its annual Pride parade later on Saturday, just months after Norway marked 50 years since the abolition of a law that criminalised gay sex.

Pakistan’s central bank asked its employees to work from home two days a week and hold more virtual meetings as the country looks to conserve fuel and ensure it doesn’t run out of US dollars, Bloomberg reported Thursday.

In a Twitter message on Thursday, State Bank of Pakistan told its staff to opt for virtual meetings, car pooling and cutting down on air-conditioning. It also suspended purchases of furniture and restricted travel.

“These measures are intended to help with the energy bill while not compromising work,” the authority said.

“We encourage the banking industry and other stakeholders to save energy as much as possible.”

Pakistan’s government has already ordered shopping malls and factories to shut early in various cities including Karachi, Lahore, Islamabad and Rawalpindi, and cut the working week by a day.

Prime Minister Shehbaz Sharif’s administration has increased pump prices by as much as 83 percent in less than a month as he tries to curb subsidies and win a bailout from the International Monetary Fund, Bloomberg reported.

The south Asian nation’s energy needs are largely met through imports and in July-May, its total petroleum import bill increased by 99 percent, according to Pakistan Bureau of Statistics’ data.