Undeterred by BJP criticism over his praise of Pakistan Prime Minister Imran Khan on the issue of the Kartarpur gurdwara corridor, Punjab Minister Navjot Singh Sidhu has written to the Centre seeking a "positive step".

"It is time for India to take a positive step on this highly emotional issue. When opportunity knocks, kindly step up and open the door. The opening of this corridor will be a huge thing for Sikh community all over the world. The corridor can usher in peace and prosperity between the two countries," Sidhu said in a letter to External Affairs Minister Sushma Swaraj that was released to the media on Sunday.