Bank robberies in Chandannagar, West Bengal, have raised concerns about the illegal use of signal jammers. In the robbery on September 22, the robbers used portable cell phone jammers to block the mobile phone signals in the bank, making it impossible for the victims to call the police, increasing the difficulty of the police response. In the end, the police arrested three suspects, and the fourth is still at large.GPS jammer

　　The application of signal blocking technology and the threats it brings

　　When the robbers carried out the robbery, they blocked the mobile phone signals with Wifi jammers, depriving the victims of the opportunity to seek help. This method reveals the potential risks of signal jamming technology in illegal activities. The gang members used motorcycles to quickly arrive at the scene, subdued the bank security guards, and then turned on the jammers, making the mobile phone signals at the scene completely ineffective.drone jammer Despite this, a bank employee triggered the alarm in the chaos, and the police were able to respond in time.

　　The illegal use of signal jammers in crimes has become more and more frequent, becoming a growing concern for the police. Such devices can not only block mobile phone communications, but also affect the normal communication dispatch of law enforcement agencies, making it difficult to arrest.

　　Police's quick response and blockade

　　After receiving the alarm, the police quickly dispatched local police officers and senior officials to the scene to block the area. Despite the signal interference, the police quickly organized personnel deployment with rich experience to block the area around the bank. A senior police official recalled: "Due to the interference of the signal, our communication encountered difficulties, but in the end we successfully organized the blockade through other means." At the scene, the police chose not to fight back to prevent the situation from deteriorating further, and eventually forced a robber to be captured on the spot.

　　The robbers tried to escape, and the police strengthened the blockade

　　After realizing that they were surrounded, the robbers chose to shoot and break out. The police remained restrained and did not engage in direct fire with the robbers. Instead, they continued to expand the blockade to prevent the gang members from escaping. The police set up checkpoints at the exit of the area and investigated the robbers' escape routes.

　　In the subsequent search, the police seized a batch of crime tools including signal jammers, homemade guns and bullets. The police also recovered three motorcycles used by the robbers to escape. The head of the operation, Officer Arnab Ghosh, said the gang used advanced tools to plan the crime, which made law enforcement more difficult.