Rourkela/Keonjhar: Suspecting spread of bird flu in Rourkela, the Sundergarh administration has formed four teams to collect blood samples of birds in the steel city and nearby areas. The Rourkela Steel Plant (RSP) authorities were asked to close the Indira Gandhi Park for visitors suspecting spread of bird flu among birds kept in a zoo located inside it. The symptoms of bird flu were observed in birds in the CISF campus as well. This was informed by the Rourkela Sub-Collector Himanshu Sekhar Behera. Besides, the officials at the District Veterinary, Municipal Corporation and Health department were alerted by the district administration about chances of spread of bird flu. The rapid response team had also been given training on how to control the flu. The Joint Secretary of the Disease Control and a scientist reached the Steel city yesterday to note the situation. Meanwhile, after two crows were found dead at different places in Keonjhar, a team led by the District Veterinary Officer reached the spot to collect samples of the carcasses. Samples from Rourkela will be tested at the laboratory to get confirmation on bird flu spread.