Delhi Jal Board Vice-Chairman Kapil Mishra has been named as new Law Minister of Delhi, after Jitender Singh Tomar resigned in fake degree case.

Mishra, a former activist with an international organisation, won from Karawal Nagar by a margin of over 44,000 votes and took oath in Sanskrit in the Delhi Assembly.

"I had a meeting with Arvind ji (Kejriwal) and have been informed about the development (of appointment as the law minister)," Mishra, a first time MLA, told PTI.

34-year-old Mishra's name was also doing rounds for a ministerial berth when AAP had won a landslide victory in February this year. However, he was made the vice-chairman of Delhi Jal Board.

Known as a Kejriwal loyalist, Mishra has been associated with him since the India Against Corruption (IAC) days.

When Yogendra Yadav and Prashant Bhushan upped their ante against the party leadership, he took a lead in starting a signature campaign urging all MLAs to back Kejriwal.

Tomar on Tuesday resigned after he was arrested and sent to four-day police custody by a Delhi court. His resignation has been accepted though AAP has refused to say why Tomar resigned so late.

Earlier in the day, The AAP leader, who was taken to Lucknow by train around midnight en route to Faizabad, maintained that his degree was "genuine".

"My degree is absolutely genuine. It is a conspiracy by BJP and the central government. Yes, They are not letting AAP government work," he told reporters this morning at the railway station in Lucknow from where he was being taken to Faizabad by road.

"There is nothing wrong with my degree," Tomar asserted.

Meanwhile, Aam Aadmi Party today stepped up its attack on the Centre and vowed to continue its "fight".

AAP's Delhi Convenor Ashutosh said those who oppose the Narendra Modi government "have to pay the price".

"Those who oppose Modi govt have to pay the price.

Tomorrow don't be surprised if AAP leaders are killed in road accidents. But we will fight," the AAP leader said in an early morning tweet.

The AAP government and the Centre have been at the loggerheads over several issues ever since the former came to power early this year.

(With PTI inputs)