The Mumbai police have registered an FIR against Aam Aadmi Party (AAP) leader Arvind Kejriwal for unlawful assembly outside the Mumbai airport upon his arrival here on Wednesday.br "We have registered a case for violating government officers' orders and prohibitory orders at the domestic airport terminal," said DCP Mahesh Patil, PRO of Mumbai police.br Along with Mr. Kejriwal, the case has been registered against other AAP leaders, including party spokesperson Preety Sharma Menon.