Delhi Congress chief Sheila Dikshit has written to party president Rahul Gandhi and his mother Sonia Gandhi saying forging an alliance with the Aam Aadmi Party (AAP) for the upcoming Lok Sabha polls in Delhi would harm the party in the long run, sources said.

Dikshit, along with three working presidents Haroon Yusuf, Devender Yadav and, Rajesh Lilothia, also expressed discontent over Congress leader PC Chacko`s phone survey through Shakti app to determine views of party workers on the alliance, the sources added. In the letter, Sheila urged Rahul to clear the air over a pre-poll alliance with AAP so that there is no confusion among the party cadres, the source mentioned.