NEW : The United Nations calls on rebels to stop fighting . African rebels occupying the city of Goma , Goma , refuse to leave . M23 leaders gave the rebel group until midnight to withdraw . The M23 group was named for a peace deal reached on March 23 , 2009 , which it accuses the government of violating . The rebels want to talk with Congolese president about breaches of a Monday peace treaty .
NEW : The United Nations calls on rebels to stop fighting . African rebels occupying the city of Goma , Goma , refuse to leave . M23 leaders gave the rebel group until midnight to withdraw . The rebels want to talk with Congolese president about breaches of a Monday peace treaty .