The incident occurred on Friday and the deceased has been identified as Mohammad Azam Usmansab (28) from Hyderabad, they said.
According to officials, about 30 persons have been arrested in this connection, including an administrator (admin) of a WhatsApp group that spread rumours about child-lifting gangs and galvanised the mob, besides the person who shot the pictures of the attack and circulated it.
Usmansab, along with his three friends, had come to visit their friend Mohammed Bashir Afroz at Handikera village in Bidar, they said.
Also, their car was without a number plate, fuelling their suspicion.
Police managed to bring the situation under control and shifted them to a hospital, but Usmansab died on the way, they said.
Police personnel are maintaining strict vigil in the area.
Mohammad Azam Usmansab was a software engineer and a resident of Shaheen Nagar in the city, his family said in Hyderabad. They urged the Karnataka government to initiate stringent punishment against his killers.
"He along with his cousin and a Qatar national Mohd Salaam and two friends went to Bidar (around 130 km) for a ride in a car from Hyderabad on Friday and at 4 pm they were attacked by a group of villagers," a relative said.
They stopped near a school and Salaam, who had brought chocolates with him from Qatar, distributed it to some children, members of his family said.
The family requested the Telangana government to intervene and take up the matter with the Karnataka government and investigate it thoroughly and arrest the culprits.
"We want justice," they said.
Deputy Commissioner of Police (South Zone) V Satyanarayana said one person was seriously injured while the Qatari national suffered minor injuries in the attack.
"They are undergoing treatment at a private hospital in Hyderabad," the DCP said.
AIMIM legislator Ahmed Balala visited the injured at the hospital. He demanded that the government put an end to targeted mob lynching.
There has been a string of attacks and lynching incidents in the country fuelled by rumours on child-lifting gangs, prompting the government to ask social media operators such as WhatsApp to clamp down on the spread of such messages.
On July 12 at Madurai in Tamil Nadu, a young woman was thrashed by locals on suspicion of being a child-lifter before police rescued her.
Five people were recently killed in North Maharashtra's Dhule district over child-lifting rumours on social media.
(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)