BJP nominee Rattan Lal Kataria was leading from Ambala by 237 votes over his nearest rival Raj Kumar Balmiki of the Congress, an Election Commission spokesman said.
Two-time MP Deepinder, son of Chief Minister Bhupinder Singh Hooda, was leading over his nearest rival Shamsher Singh Kharkra of INLD by a margin of 2644 votes.
From Sirsa (SC) constituency, Tanwar, who is Haryana Congress chief, was leading over his nearest rival Charanjit Singh Rori of the INLD, which is the State's main opposition party, by a margin of 1601 votes, according to the early trends.
Elections to the 10 parliamentary seats in Haryana were held on April 10.
In 2009, Congress had won nine seats and Haryana Janhit Congress (BL) one.