The incident took place on Hisar-Bhiwani road this afternoon, they said.
After they alighted a bus in the village and were walking towards their destination, two bike-borne men came and tried to snatch the bag containing money, they said.
Police said the assailants also took away the firearm of the guard.
The guard has been admitted to a private hospital in Hisar where his condition is stated to be the critical, the police said.
A case has been registered in Bawani Khera police station against unidentified accused and further investigations were under progress.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)