Yevloyev's website is said to be one of the most visited for Ingush news
The owner of an internet site critical of the Russian authorities in the volatile region of Ingushetia has been shot dead in police custody.
Magomed Yevloyev, owner of the ingushetiya.ru site, was a vocal critic of the region's administration.
The Russian prosecutor's office said an investigation into the death had been launched, Russia media report.
A post on Yevloyev's site says he was detained by police after landing at the airport of the main town, Nazran.
The website owner was taken to hospital but died from his injuries.
Reports quoting local police said Yevloyev had tried to seize a policeman's gun when he was being led to a vehicle. A shot was fired and Yevloyev was injured in the head.
Yevloyev was a thorn in the side of Ingush President Murat Zyazikov, a former KGB general.
His website reported on alleged Russian security force brutality in Ingushetia, an impoverished province of some half a million people, mostly Muslims, which is now more turbulent than neighbouring Chechnya.
President Zyazikov had been on the same flight as Yevloyev.
Ingushetia borders Chechnya and has suffered from overflowing unrest.
There is a low-level insurgency, with regular small-scale ambushes against police and soldiers.
In June 2008, the Human Rights Watch group accused Russian security forces there of carrying out widespread human rights abuses.
HRW said it had documented dozens of arbitrary detentions, disappearances, acts of torture and extra-judicial executions.