Security has been beefed up in Dehradun with police and administrative officials being put on alert in view of Ramnavami celebrations on Saturday. Additional forces will be deployed at important temples and religious places in the city, said SSP Pushpak Jyoti on Friday. The police pickets have been set up at a number of places and station police officers have been directed to conduct vehicle checking drives at various places in the city. The traffic police will be deployed at crossings to resolve traffic congestion in the city, he added.