The US family planning clinic said that reports that the gunman who attacked its Colorado centre had uttered "no more baby parts" during his arrest showed that the suspect was motivated by an anti-abortion agenda.
The remark attributed to the 57-year-old suspect, identified by police as Robert Lewis Dear, was an apparent reference to Planned Parenthood's abortion activities and its role in delivering foetal tissue to medical researchers, a hot button issue in the 2016 race for the presidency.
Three people were killed and nine others were injured in Friday’s attack.
"We now know the man responsible for the tragic shooting at PP's health centre in Colorado was motivated by opposition to safe and legal abortion," the organisation said.
Conservatives have accused Planned Parenthood, a non-profit organisation that provides a range of health services, including abortion, of illegally selling baby parts, an accusation it has strenuously denied.
Mr Dear, a South Carolina native who moved to Colorado, made the remarks during his arrest after a stand-off lasting several hours at the Colorado Springs clinic on Friday, NBC News and other media outlets reported.
While Mr Dear's remarks could hint at a possible motive for Friday's shootings, NBC's sources stressed that investigators were still not sure of why he carried out the attack.
Authorities have steadfastly declined to discuss a motive for the attack, saying their investigation was still under way.
Mr Dear has been jailed ahead of a court appearance scheduled for tomorrow.
The Colorado Springs centre has been repeatedly targeted for protests by anti-abortion activists.
Abortion opponents have fiercely criticised Planned Parenthood after officials of the organisation were secretly recorded by an anti-abortion group discussing compensation for providing human tissue from aborted foetuses to researchers.
Critics say the footage is evidence that Planned Parenthood illegally sells baby parts, but the non-profit organisation denies the accusation, saying that a few affiliates have donated tissue for research and were paid a small fee to cover costs.
Planned Parenthood recently announced it was discontinuing the practice to tamp down the controversy, but its critics say that is an admission of guilt.
The Centre for Medical Progress, which produced the videos, could not be reached for comment today but issued a short statement on its website.
"The Centre for Medical Progress condemns the barbaric killing spree in Colorado Springs by a violent madman," it said.
