Noida: Owners of more than 1,800 vehicles were issued challans across Noida and Greater Noida on Friday for alleged violation of curbs imposed due to the COVID-19 outbreak, Gautam Buddh Nagar police said.Around a dozen vehicles were also impounded for similar violations across the district, which has so far recorded over 7,600 positive COVID-19 cases, including 45 deaths, according to official figures.Criminal Procedure Code (CrPC) Section 144, which bars assembly of more than four persons, is in force in Gautam Buddh Nagar in view of the pandemic even as security checks intensified in the wake of lockdown-like curbs over the weekend beginning 10 pm Friday, officials said. "A total of 4,830 vehicles were checked across 200 barrier points in.