The United States Mission in Nigeria has advised Nigerian travellers to comply fully with the terms of their visas, warning that violations could affect their chances of travelling, studying or working in the country in the future.

The mission gave the advice in a message posted on its official X account under the #VisaWiseTravelSmart campaign, urging visa holders to stay only for the period approved by US immigration authorities.

It said adherence to immigration rules remained important for Nigerians seeking to preserve future opportunities in the United States.“Staying compliant with U.S. immigration laws isn’t just the right thing to do; it protects your future and keeps opportunities open for Nigerian travelers,” the mission said.

The embassy urged visitors, students and workers to keep their travel documents valid, comply with visa conditions and avoid actions that could lead to future ineligibility.

“Whether you’re studying, working, or visiting the United States, always honour the terms of your visa. Follow the rules. Stay only for as long as you are authorized. Keep your documents updated,” the post added.

Japan has implemented a five-fold increase to visa fees for all foreigners, marking the first price hike in nearly 50 years.

From 1 July, single-entry visa fees will be raised from the current 3,000 yen ($18.69; £14) to 15,000 yen, while multi-entry visas will now cost 30,000 yen, up from 6,000 yen.

The visa fee revisions – the first since 1978 – were made to “reflect inflation and exchange rate fluctuations”, said Foreign Minister Toshimitsu Motegi.

“We do not anticipate that it will have an immediate impact on inbound tourism,” he added.

The Japanese yen has been weakening continually since 2021, and is now hovering near historic 40-year lows.

Former US Federal Reserve chair Alan Greenspan has died aged 100, his wife has said.

NBC News correspondent Andrea Mitchell said in a statement reported by her employer that her husband had died from complications of Parkinson’s Disease.

Mitchell’s statement said Greenspan was “a giant of a man who helped shape the US economy for decades under presidents of both parties, but was always honest in acknowledging his mistakes”.

For nearly 20 years, Alan Greenspan was charged with safeguarding the US economy and keeping the dollar sound.

As chairman of the Federal Reserve from 1987-2006, a post described as the second most important after the presidency, he presided over the longest sustained period of US economic growth in a generation.

Described as the “God in the machine” of American finance, Greenspan declined all requests for interviews during his time at the Fed.

The media and the money markets hung on his few public statements, and a sign in his office said simply, “the buck starts here”.