The summons come after an FIR was registered by the ACB on April 30 based on allegations of financial irregularities to the tune of Rs 2,000 crore in the construction of over 12,000 classrooms or semi-permanent structures in Delhi government schools.
The sender of the SMS also said in his Hindi message that he was "sorry" for deciding to eliminate Tiwari under "extreme compulsion".
The Delhi Bharatiya Janata Party chief asserted he did not break any law. He hit back at the AAP for raising the issue to "divert attention" of media from allegations of corruption against its MLA Prakash Jarwal who is currently behind the bars.