KITCHENER -- An Amber Alert has ended after two young girls went missing in Kitchener, Ont.

Waterloo Regional Police tweeted early Tuesday that the children, ages one and three, were found safe as a result of the Amber Alert.

According to police, the incident started after an altercation in a Kitchener park where a group had gathered at around 6:30 p.m.

During the altercation at the park, near River Road East and Kinzie Avenue, two men were reportedly stabbed and later taken to hospital.

"Police found two adult males with multiple stab wounds," Const. Ashley Dietrich said. "Those males were transported to hospital and have since been treated and released."

"That's the time that my kids would be out here playing," neighbour Vanessa Hillen said. "Other kids in the neighbourhood would be out here playing and to know that took place right here in broad daylight is even more concerning to me."

Police say that a male and a female took two children during the altercation, and were last seen in the River Road East and Kinzie Avenue area of Kitchener. Officials say the adults were known to the girls.

Out of concern for the children's safety, an Amber Alert was issued at around 11:30 p.m. Monday night.

"Due to safety issues for the children, police issued an Amber Alert," Dietrich said.

According to police, the alert played a direct role in finding the children, who were found a short time later.

"We received information regarding the children's whereabouts and they were located safely at a Kitchener residence," Dietrich said.

Police say one woman was arrested in connection to these incidents, and a male suspect remains outstanding. Two other men were charged with assault with a weapon in relation to the stabbing.

"Police are actively attempting to locate a third individual involved in the abduction and stabbing incident," Dietrich said.

The investigation is ongoing.