The Mankapur Indoor Stadium herehas cancelled all its activities till March 31 in wake of the coronavirus pandemic, an official said on Friday.Maharashtra has so far recorded 52 positive cases of Covid-19, the highest in the country."As a precautionary measure, we have suspended all sporting activities at the centre," deputy director of sports and youth services Subhash Rewatkar told PTI.Around 700 sportspersons used to visit the centre for practice on a daily basis, the official said, adding that no visitors will be allowed till March 31.