CHENNAI: The police arrested a BPO employee on charges of criminal intimidation through anonymous mail here on Thursday. Police said that they received a letter on March 8, which warned that two landmark buildings in the city would be destroyed. It was found that Stalin Sajeesh (25), a native of Mysore, had wanted to marry a girl. However, she married someone else. Angereed by this he wrote a letter with warnings in the name of the girl's husband and posted it to the Commissioner of Police.