LONDON - Jemima Khan, the ex-wife of PTI chief Imran Khan, has said that she is worried for him after receiving news of firing on his vehicle in Gujranwala."Update please from anyone on the protest march? We're worried here," Jemima Khan said in her message on Twitter.Her message came hours after clashes erupted in Gujranwala on Friday following shots were fired at Khan's container during his Azadi March towards Islamabad.Khan, who is leading thousands of his supporters to the federal capital, remained safe in the firing; however, violence subsequently erupted in the city between PTI and PML-N supporters, turning the area into battlefield. Jemima and Imran have two sons Sulaiman Khan and Qasim Khan. She also expressed concern over the condition of her son Qasim Khan who was slightly injured after falling from the container on Thursday.