A British journalist is in intensive care in a Sri Lankan hospital after being shot in what a senior United Nations official said was an attempted assassination.
Faraz Shauketaly, who works for the Sunday Leader newspaper, is said to have suffered serious injuries to his neck in an attack by three gunmen in his home on the island.
Foreign Office Minister Alistair Burt said it "remained unclear" whether the incident - the latest in a spate against reporters - was related to Mr Shauketaly's work on the English-language paper.
Sri Lankan journalist Faraz Shauketaly, 54, a reporter with the privately-run Sunday Leader is rushed to hospital in Colombo
Burt said the Sri Lankan authorities "must quickly identify who committed this crime and bring them to justice" - accusing them of doing too little to investigate previous incidents.
And the United Nations High Commissioner for Human Rights Navi Pillay said she was "deeply disturbed" by the attack on someone who worked for a publication critical of the Sri Lankan government.
Sunday Leader editor Sakunthala Perera said the gunmen stormed the home of the journalist - who holds dual UK/Sri Lankan nationality - on Friday in Mount Lavinia on the outskirts of the capital, Colombo.
He is reported to be awaiting surgery and was visited in hospital on Saturday by UK consular staff.
Burt said: "There has been a range of attacks in Sri Lanka on journalists, civil society organisations and others in recent years. To date, too many incidents have had little investigation and no resolution.
"The UK and EU have urged the Government of Sri Lanka to do everything possible to investigate such incidences and ensure that those responsible are brought to justice."
Pillay told Channel 4 News: "I'm deeply disturbed by this particular shooting because it's a journalist and he's attached to a newspaper that's known to be critical of the government - particularly on accountability and in justice issues - which are issues that I cover.
"I will be reporting to the Human Rights Council my concern over extra judicial killings, abductions and this kind of treatment and suppression of freedom of expression."
She said he should be given immediate protection.
"Whoever tried to kill him obviously was targeting him. It's an act of attempted assassination so he needs to be protected immediately."
There needed to be a "proper investigation before we can conclude" whether there was any state involvement in the attack, she said.
"The Sri Lankan government swears by the integrity of their army and their police, well it's time they demonstrated that.
"These institutions built into the democracy must now begin to work properly and this is an immediate instance where they can demonstrate that."