Atlantic City police said that Rice and Janay Palmer were both arrested on simple assault charges and were released on a summons after an incident at the Revel Casino early Saturday morning.
Both Rice and Palmer declined medical attention and neither reported any injuries.
Michael Diamondstein, an attorney for Rice, says that he's hopeful that after an investigation "the matter turns out to be little more than a misunderstanding."
The Ravens released a statement Sunday night.
"We are aware of the Friday night situation with Ray Rice and his fiance," the Ravens said. "We have spoken with Ray, and know that they returned home together after being detained."
Rice played at Rutgers University in New Jersey and was drafted in the second round of the 2008 draft by the Ravens.