Four people were injured in a knife attack at a hospital in Shanghai, China, officials said. This is the second stabbing incident that has been reported at the 100-year-old Ruijin Hospital since the lifting of COVID-related restrictions last month, Reuters reported. Police responded to the scene after receiving calls of a possible knife attack at the hospital, where they found frightened staff and a bloody crime scene. Police officers stand outside the outpatient department of Ruijin Hospital after a stabbing incident in Shanghai, China, July 9, 2022. REUTERS/Brenda Goh (REUTERS/Brenda Goh) Videos taken at the scene show doctors, nurses and other staff leaving the hospital with their patients. CHINA SAYS SHANGHAI IS ‘OPEN’, BUT HUNDREDS OF THOUSANDS ARE STILL LOCKED IN THEIR HOMES One witness described the situation as “very shocking” and “very desperate,” Reuters reported. According to the report, knife attacks on hospitals in China have become more regular. LOCKDOWN IN SHANGHAI, CHINA’S LARGEST CITY, TO RELAX IN FEW DAYS: OFFICIALS Police officers walk outside the outpatient department of Ruijin Hospital after a stabbing incident, in Shanghai, China, July 9, 2022. REUTERS/Brenda Goh (REUTERS/Brenda Goh) “Hospitals are a flashpoint for many in China, who face issues from touts trading illegal appointment tickets, long lines to see doctors and corruption that can drive up the cost of care,” Reuters reported. Then, attacks on staff members and doctors are also somewhat common, according to the report. INSIDE MASS QUARANTINE CENTER SHANGHAI: NO SHOWERS, LIGHTS ON 24/7 Police officers stand outside the outpatient department of Ruijin Hospital after a stabbing incident in Shanghai, China, July 9, 2022. REUTERS/Brenda Goh (REUTERS/Brenda Goh) Police closed Ruijin Hospital after the attack and administrators canceled all appointments, Reuters reported. The police are investigating. CLICK HERE TO GET THE FOX NEWS APP The seaside city of Shanghai is the country’s largest city. The condition of the victims was not reported.