Decides to issue notices to Information Minister Fawad Chaudhry and Railways Minister Azam Swati for further proceedings.
"Pakistan's future is of a progressive country where minorities will be completely safe," says Info Minister Fawad Chaudhry.
The election commission has sought a reply from the PTI chief within 14 days.
PML-N's Miftah Ismail says RO refused to provide Form 45 and Form 46 as well as a full audit.
Shehbaz Sharif says "happy" over decision, narrow difference "necessitated" recount in interest of transparency.
Notice issued a day after Abbasi threatened to hit Speaker Asad Qaiser with his shoe after the two exchanged harsh words.
Decision taken to "make the holding of elections transparent and make administrative affairs fool-proof", ECP says.
The commission also rejected a plea to stop the issuance of the PPP senator-elect's victory notification in recent polls.
Directs him to appear in the next hearing and submit his answers to questions raised by the Election Commission in person.
"No need to be upset," Fawad Chaudhry tells ECP; says it's inappropriate for ECP to issue statement on PM's remarks.
The announcement about the vote was made after the ruling PTI lost the Senate general seat from Islamabad to opposition.
Says decision being taken due to "time constraints"; committee formed to take input on use of tech in future Senate polls.
Commission orders suspension of Sialkot DC and DPO as well as Daska's AC and DSP.
CEC notes that RO seemed "distressed" when he contacted the commission on the night of NA-75 by-poll.
ECP says final result can't be released sans complete probe; Shibli Faraz says results received by polling agents suggest PTI won.
A total of 52 senators in the house of 104 are set to retire on March 11 on completion of their six-year term.
Commission censures counsel for requesting another postponement, orders minister to personally appear in next hearing on Feb 24.
Opposition protests delay in foreign funding case against PTI; ECP says "fully aware of its constitutional responsibilities".
Ministers Fawad Chaudhry, Fehmida Mirza and Ali Haider Zaidi are among the lawmakers whose membership has been suspended.
ECP has suspended the membership of 318 lawmakers part of Senate, NA and provincial assemblies.