Krefeld (dpa / lnw) - Two strangers masked with black balaclavas attacked and knocked down an 84-year-old woman in Krefeld in her apartment. The two men rang the bell on Friday afternoon and forced open the door, which the woman had initially only opened a crack, the police reported. The elderly fell. The perpetrators locked her in a room. There she managed to press the button on her house emergency call. Before she could be freed, the men had fled undetected. They were wanted. Helpers took the slightly injured pensioner to a hospital. The police are looking for witnesses.