One man has been arrested after police say two groups were robbed at gunpoint in a Greektown park and police are appealing to witnesses to help find a second suspect.

In the first instance, on Aug. 8, two men cycled past a group of three men having a conversation at Withrow Park, police say.

Police say the cyclists returned, and one of them pulled out a gun. The two men demanded money from the group, after which they rode away on their bicycles.

In the second instance, on Aug. 21, police were called at 6:29 a.m. after they say five women who were exercising in the park were robbed at gunpoint.

Police say a man approached them while they were exercising, initially just having a conversation with them. He then left but came back with his face covered, brandishing a silver firearm.

The women said the man threatened to kill them, and took their money and personal items, police say.

Police arrested Jorge Jose, a 27-year-old from Toronto, on Thursday in relation to both instances. Jose faces 14 charges, including two counts of robbery with a firearm.

Police are looking for a second suspect in the Aug. 8 incident. He is described as black, wearing a red hoodie that was tied tightly around his face, police said. The bike he was riding is black with a low seat and high handlebars, they said.