A Canadian tourist who was held at knifepoint in Shenzhen and robbed of $1,800 within an hour of crossing from Hong Kong on a shopping trip has vowed never to return to the mainland alone. While recovering from the shock of being robbed herself, Andrea Burns' ordeal was compounded when she saw the men who held a knife to her minutes earlier beat a young mainland woman senseless. The attack, which took place in daylight as Ms Burns, 25, sat on a bench on a busy street near Lowu Station, has been reported to the Canadian Consulate and police in Hong Kong. The reports have also been passed on to the Canadian Consulate in Guangzhou and to the Public Security Bureau. The attack on Ms Burns came amid escalating worries over Shenzhen's often mean streets, as tourist movements between the mainland city and the SAR become increasingly seamless. Two years ago, the Sunday Morning Post revealed how Hong Kong's North District Hospital - the closest to Shenzhen - was regularly treating victims of violent crime who did not want to be treated on the mainland. Ms Burns, who is now back in her home city of Vancouver, got no help from mainland police, who were called by a Shenzhen resident as a crowd watched her being robbed. The tourist had just crossed over on September 25 from Hong Kong, where she was staying with her aunt, Marlynne Danaher. Ms Burns, who had previously travelled across Asia without trouble, told how a Chinese man in his 20s sat down beside her and rested a 'big' knife on her arm before telling her to hand over her valuables. Other members of his gang also sat down next to her and looked through her wallet but only took her cash, which amounted to $1,800. 'It lasted for about four minutes and what really shocked me was that no one did anything. I kept saying 'call the police, call the police', but no one did. 'Eventually, a guy called them, but they never came,' she said. The men left after taking her money but came back within minutes and 'viciously' beat a young mainland woman. 'There was no apparent reason for the attack but they beat her up pretty badly. The most shocking thing was that no one seemed to care, they just stood by,' Ms Burns said. Eventually a police motorcycle arrived and took the injured woman away, but no one spoke to Ms Burns. 'I wanted out of there as quickly as possible so I got on the next train back to Hong Kong. 'Maybe because I had been travelling safely around Asia, I let my guard down. I won't be going back there soon, and certainly never alone,' Ms Burns said. Ms Danaher called on Hong Kong police to work closely with their Shenzhen counterparts to tighten security. After the robbery, the panic-stricken tourist was lucky to have enough coins left in her wallet to take a taxi to the train station and get back to Hong Kong. Ms Danaher, who has visited Shenzhen several times with her friends, said she mistakenly believed it would be safe for her niece to travel to the mainland city by herself. 'If I have friends and relatives visiting Hong Kong, I will not encourage them to go to Shenzhen alone,' she said.