A Briton has been arrested in Nepal for allegedly participating in protests against the country's new constitution, Nepal's home ministry has said.
The man, identified as Martin Travers, 41, was questioned over his involvement in the demonstration by ethnic minority groups, official Yadav Koirala said.
Police arrested the UK national on Monday during a protest in Kathmandu.
The UK's Foreign and Commonwealth Office said it was providing consular assistance to a man.
A spokesman said: "We are providing assistance to a British man who has been caught up in the protests in Singha Durbar, Nepal on 16 May."
Mr Koirala said that Mr Travers would have his visa revoked and be deported if he was found to have been involved in the protests, which are being held by Madhesi people and other ethnic groups upset about a new constitution adopted last year.
He said Mr Travers claimed he was forced to take part in the protest and he would be freed on Tuesday if that was true.
The Madhesi groups - representing people living in Nepal's southern plains bordering India - have been holding protests demanding better representation under the new constitution.
Protesters have been blocking traffic and chanting anti-government slogans since Sunday.
Earlier this month, Nepal ordered a Canadian man to leave the country, saying that messages he posted on Twitter threatened national unity and criticised the government's handling of ethnic protests.