Speaking during an interview on DawnNews, Khanzada gave details as to the background of the individual who carried out the attack.
He said the investigation into the Wagah border attack is still ongoing and that to blame a particular individual would not be prudent.
"We found a handkerchief on which 'congratulations on martyrdom' was written in Pashto," he said.
"Based on that evidence we can tell that the individual was Pashto speaking," said Khanzada.
During the interview he stated that intelligence reports pointed out to the possibility of at least four bombers carrying out an attack.
"The intelligence suggested that there would be at least four to five jacket wallahs," he said.
"The information we received is that the bomber was transported by truck... we also found a suicide jacket in a parking lot, which we disarmed," said the Punjab home minister.
Khanzada said that truckers and drivers from Khyber-Pakhtunkhawa and Balochistan
...the Pak province bordering Kandahar and Uruzgun provinces in Afghanistan and Sistan Baluchistan in Iran. Its native Baloch propulation is being displaced by Pashtuns and Punjabis and they aren't happy about it...
have also been rounded up in connection with the bombing.
The Jamaat-ul-Ahrar splinter group of the Tehrik-e-Taliban Pakistain (TTP) grabbed credit for the Wagah border attack.
Its front man Ehsanullah Ehsan
...formerly the front man for the Pak Taliban, now the lips and tongue of the Jamaatul Ahrar splinter group in Mohmand Agency...
has said that it was carried out by one of their men.