Hamilton Police investigating two aggravated robberies in Flagstaff on Saturday are asking for anyone with information to come forward.

The first incident occurred about 3.30pm in a car park beside Flagstaff Park.

"Two individuals were approached by two men wearing black clothing and balaclavas, armed with weapons," says a police spokesperson.

"They demanded phones from the victims, who fled, however one of them was then assaulted, receiving scrapes and bruises, and their phone was stolen."

Police say the offenders then left the area in a vehicle.

Offenders fled in a stolen silver Toyota Axio, registration registration QBG553. Photo: Supplied.

River Road incident

Later, about 7pm, Police were called to River Road, after four offenders arrived in two vehicles and entered a liquor store armed with weapons.

"They took a number of items before fleeing in a stolen silver Toyota Axio, registration QBG553, which has since been recovered.

"The shop assistants were not hurt during the incident but were understandably shaken."

Police are now working to locate the offenders in each of these cases, and to establish whether there is any link between the incidents.

"We'd like to hear from anyone who has information about either incident or the people involved."

If you can help, please call 105 and quote file number P055261730 in reference to Flagstaff Park, or P055263594 in reference to River Road.

CCTV image of the incident at River Road. Photo: Supplied.