landmines. Human Rights Watch considers that "the FARC-EP's continued use of gas cylinder mortars shows this armed group's flagrant disregard for lives of civilians...gas cylinder bombs are impossible to aim with accuracy and, as a result, frequently strike civilian objects and cause avoidable civilian casualties." According to the ICBL Landmine and Cluster Munitions Monitor, "FARC is probably the most prolific current user of antipersonnel mines among rebel groups anywhere in the world." Furthermore, FARC use child soldiers to carry and deploy antipersonnel mines. Treatment of women Female membership of the group is around 30 to 40 percent and while FARC's official policy forbids sexual assault of any kind, female members have experienced rape, sex slavery, and forced abortions. In a 2011 Colombia Police report, 112 women had deserted FARC and reported instances of being forced to have sex with commanding officers which lead to the spread of sexually transmitted diseases as well as pregnancy. Members who became pregnant were forced to have abortions at any stage of gestation, with an estimated 80 to 90 percent of ex-FARC female members having had at least one abortion, some having up to four. The report also claims that girls as young as 13 were recruited by FARC to fill a quota of women because “The women are [considered] necessary to maintain the discipline of the FARC." In an interview with Reuters, Claudia Roa, who joined FARC when she was 14, told how she was unknowingly given pills to induce birth when she was 8 months pregnant, after which her child was suffocated to death. According to Rao, many other women faced similar treatment, but those who became girlfriends to commanders were awarded special privileges, including the right to have children. One Colombian newspaper, after reviewing uncovered FARC documents and speaking with investigators, estimated that 1,000 forced abortions occur each year in FARC camps. In 2015, the Colombian attorney general opened an investigation into 150 cases of ex-FARC women being forced to terminate their pregnancies. Violence against indigenous people FARC sometimes threatened or assassinated indigenous Colombian leaders for attempting to prevent FARC incursions into their territory and resisting the forcible recruitment by FARC of indigenous youth. Between 1986 and 2001, FARC was responsible for 27 assassinations, 15 threats, and 14 other abuses of indigenous people in Antioquia Department. In March 1999 members of a local FARC contingent killed 3 indigenous rights activists, who were