The deaths of two US border patrol agents after their Colombian vacation is being investigated by the FBI.
Jaime Eduardo Cisneros, 54, and Alexander Ahmed, 54, traveled to Colombia together in late May.
But before they returned home, Cisneros was found dead in a Medellin hotel after a tryst with a woman described locally as a prostitute.
Ahmed then killed himself on American soil after returning home from the trip, before FBI agents had the chance to interview him about his friend's death.
Cisneros' cause of death remains unknown. The woman he'd been with was seen waving goodbye to him and leaving his room, according to local outlets.
Jaime Eduardo Cisneros, 54, (left) a US Border Patrol agent assigned to duties in El Paso, Texas, was found dead in his Colombian hotel room on May 31. His cause of death remains unknown. After the trip, Alexander Ahmed (right) killed himself
US investigators spent days in Medellin working with Colombian officials to piece together how he died.
Officials discovered that his phone and other valuables were missing from the hotel room where his body was found, and his clothes and suitcase were in 'total disarray'.
His wallet had also been emptied.
After his death, Ahmed returned to Texas alone, but killed himself days after.
Ahmed was assigned to the Clint station, part of the Border Patrol's El Paso Sector
Amhed can been seen vacationing in Colombia's capital city, in photos released of the US federal agent by his family
Ahmed's body was discovered June 4 in El Paso.
Both men were assigned to the Clint station, just outside Texas' sixth largest city, and were nearing retirement eligibility.
US Customs and Border Protection, the parent agency of US Border Patrol, did not immediately respond to a request for comment by DailyMail.com.
In December, the US Embassy in Bogota issued a travel alert after eight American men died in a span of two months in the South American nation under 'suspicious' circumstances.
To date, 28 tourists, including Americans, have died in Medellin this year, Colombian authorities admitted.
Tou Ger Xiong fell in love with the Colombian city of Medellín because of its culture and frequently traveled there, posting about women his met online. The body of Minnesota comedian and activist was found in a ravine December 11 after he had gone out with a woman he had met during a previous trip to the city
Medellin, Colombia is known as the city of eternal spring for its climate
Colombian authorities found the lifeless body of American Phillips Ryan Mullins, in a hotel. According to preliminary reports, witnesses reported he had gone out in the company of other travelers to a party that lasted all night on Friday, December 15, arriving to sleep in his hotel room around 7:00 a.m. in the morning of Saturday, December 16
Their deaths range from suicides, illness, drug overdoses and homicides.
US officials said American tourists have been targeted in a dating app scheme.
The apps are not named in the government bulletin, but Tinder, Bumble and a third app called Colombian Cupid, are the most widely used dating apps in the country.
'Over the last year, the Embassy has seen an increase in reports of incidents involving the use of online dating applications to lure victims, typically foreigners, for robbery by force or using sedatives to drug and rob individuals,' embassy officials explained.
Embassy officials urge anyone who is a victim of a robbery attempt not to resist, since you're more likely to be killed.
They're also advising travelers to Colombia to share their plans with friends and loved one back home since the phone of victims are often stolen in an effort to hide all evidence.
American Tou Ger Xiong made friends in Medellín during his multiple visits to the Colombian city. In October, he posted pictures of a dinner with a woman (pictured) at a Korean restaurant and apparently went with her to a Karol G concert during his most recent trip which culminated with his death
Tennessee resident Phillip Mullins was found dead inside his room at the 1 Million Suites hotel in Medellín, Colombia, on Dec 16
Medellin, a safe and popular tourist destination in recent years, was once the headquarters for drug lord Pablo Escobar and his Medellin Cartel
Authorities believe Americans who falling victim to this type of crime often do come forward.
'These types of crimes routinely go underreported as victims are embarrassed and do not want to follow through with the judicial process,' the embassy said.
Medellin, infamous as the home of drug lord Pablo Escobar, had been relatively safe in recent years.
However, the past year, tourism officials in Medellin noticed a 200% increase in thefts involving foreigners.
Deaths increased by 29% and most of the murder victims were Americans.