last night I was coming back to my home from my friends marriage party. I was around 01:30am. I was driving my car suddenly I saw some 4 unknown persons wearing mask in my street. They were carrying a black color bag in their hand and move towards to my building. I followed them cleverly and I saw that they opened my neighbor's house with a master-key. Two of them was holding gun in their hand and other two were holding a knife. They entered into the house and after a few minutes I heard scream of my neighbor I got so scared and immediately I called to police. When they were robbing my neighbor, the police reached on time and saved the life of my neighbor from robbers.