Johannesburg - Two men were shot while defending their mother during an armed robbery at their house in Brentwood Park, Benoni, on Wednesday, Gauteng police said."This morning at about 03:00 at unit 48 in Mashoba Lodge in Brentwood Park, Benoni, two men armed with firearms entered the premises by breaking the front door with a crow bar," Lieutenant Nomsa Sekele said."The owner, a woman, heard a noise in the passage. As she walked into the passage to see what was happening, she saw the two suspects fighting with her sons. Both her sons had already been shot."The sons, aged 53 and 47, were taken to hospital for further treatment.Netcare 911 spokesperson Santi Steinmann said the 53-year-old was airlifted to hospital in critical condition. His brother sustained serious injuries and was taken to hospital by ambulance for further treatment.Sekele said the robbers only took the woman's handbag, which contained some money and documents.No arrests have been made. Police were investigating.