A woman and a child were killed and four others sustained injuries when unidentified armed men attacked a house here on Sunday night. Police said that armed men attacked the house with automatic weapons, killing a woman and a child at the spot and inflicting injuries on four others. The injured were shifted to hospital for treatment. The attackers fled from the area while police on hearing the gun shots rushed to the site of the firing. No reason for the attack on a particular house was given but police suspected that the incident was the outcome of enmity.