Greek police could be employing similar types of tear gas canisters to those that have killed and seriously injured dozens of protesters in Iraq, according to investigative website Bellingcat.
Zooming in on photos shared online, Bellingcat said Greek police appeared to be using long-range tear gas canisters that are designed to be fired from far greater distances and could constitute lethal force if fired from the range that has stood between migrants and Greek police over the past few days.
The report said the markings on the canisters indicated they were "CS 560 Long Range" canisters designed by U.S.-based Defense Technology firm.
"A police fact-sheet from 1969 describes this munition as weighing 284 grams, with a muzzle velocity of 225 feet per second and a range of 150 yards. It is not yet known if more modern versions of this munition have different characteristics," the report said.
"The use of this kind of munition may be the reason for multiple claims, images and videos, of seriously wounded or dead protesters at the Greek-Turkish border. This included an incident on March 2nd which was reported to have resulted in the death of a Syrian man after he was shot in the throat," it added.
According to Turkish officials, Greek forces killed a migrant and wounded five others Wednesday as the migrants tried to cross the border between the two countries.
Two Turkish security officials and the local governor's office in the border province of Edirne said the migrant had died in a hospital from a chest wound after Greek police and border guards fired live ammunition near the crossing at Pazarkule. They said five others had suffered head and leg wounds.
Thousands of migrants have been forced to sleep in the open, some since last week, exposed to the elements and in temperatures close to freezing in Edirne in northwestern Turkey.
Over 100,000 migrants have left Turkish borders through Edirne for Europe since Friday, Interior Minister Süleyman Soylu said Sunday.
Last week, Turkish authorities announced that they would no longer prevent the flow of migrants who wanted to reach Europe.
The decision was made after 36 Turkish soldiers were killed by Bashar Assad regime forces in Idlib in northwestern Syria. The Turkish soldiers were deployed to the region to protect local civilians under a 2018 deal with Russia under which acts of aggression are prohibited.