TOKYO: A theme park in Tokyo featuring the Hello Kitty character closed on Feb 24 because of an e-mailed “terrorist alert”, the operator said. Sanrio Puroland in the capital Tokyo is known for its rides, shows and cutesy cartoon mascots including the beloved feline-like heroine. “We decided to temporarily close for the day because the safety of visitors, performers and staff cannot be guaranteed at the moment,” the indoor theme park said in a message on its website. The unspecified threat prompted police to scour Sanrio Puroland for suspicious objects, but none were found, public broadcaster NHK reported. Sanrio opened the Sanrio Puroland theme park in Tama City, Tokyo in 1990.