Rapid Action Battalion (Rab) yesterday arrested four people, including a woman, from the capital’s Uttara area for their suspected involvement in the attack on a Taiwanese couple, reports UNB The identities of the arrestees are yet to be known. Tipped off, a team of Rab raided a house in the area and arrested them, said sources at the Rab headquarters. Earlier, on November 5, a Taiwanese couple- Wang Ming Chee and his wife Lily Hawa--was attacked by their former employees at their house in the city’s Uttara area. They also looted Tk 6 lakh from their possession.