Director General Inter-Services Public Relations (ISPR) Major General Asim Saleem Bajwa said the convicted terrorists were involved in heinous acts of terror including manslaughter, suicide bombing and loss of life and property.
It is learnt that all the terrorists belong to Khyber Pakhtonkhwa. The death row convicts will have a right to appeal in a court.
The six convicts given death sentence were identified by a senior military official as Noor Saeed, Haider Ali, Murad Khan, Inayatullah, Israruddin and Qari Zahir.
A seventh man, identified only as Abbas, was given a life sentence, the official said.
AFP adds: No further details were immediately available about the convicts or the crimes of which they were accused. It was not clear where or when the trials were held.
“There is no information available about when and where the trials were held and keeping everything confidential would create doubts about military courts,” political analyst Hasan Askari told AFP.
Pakistan has carried out 65 executions since lifting the moratorium on the death penalty.
It was initially lifted only for those convicted of terrorism offences, but was extended to cover all capital offences in March.
The European Union, the United Nations and human rights campaigners have all urged Pakistan to reinstate the moratorium.
Pakistan lifted a six-year moratorium on the death penalty and announced the establishment of militarycourts in the case of terror offences in the wake of a Taliban massacre that killed 154 people, mostly schoolchildren, in December.