NEW : The incident began at 10 a.m. Hong Kong urges no trips to Philippines after killings . The Chinese government has said it is investigating the incident and will take appropriate action. China condemned the `` atrocious behavior of the criminal '' The gunman 's brother has been accused of conspiring with him .
NEW : Hong Kong urges no trips to Philippines after killings . The Chinese government has said it is investigating the incident and will take appropriate action. China condemned the `` atrocious behavior of the criminal '' The gunman 's brother has been accused of conspiring with him .