Earlier this week, Saudi authorities in Bisha, Asir governorate, found another dead body thrown in the middle of a road, Twasul news site reported.
Local police have since launched an investigation into the crime, which led to the death of a young African man.
The grim discovery comes two days after a body was found lying on a road located in Al Dayer, Jazan governorate, and a week after another was found tied to a bed in the middle of a local highway in Abha.
The three deceased men are all of African descent and are suspected to have entered the country illegally.
A serial criminal or coincidence?
The similarities in the three recent cases led thousands to speculate whether a serial killer was on the loose in the kingdom. However, there isn't evidence to prove all recent crimes are connected.
Authorities have yet to issue an official statement on the matter and are investigating each case separately.
The latest case sparked fear among Saudis
"Oh God, what is this?"
"Every two days another body ... where are we living?"
"They want to scare people in the kingdom"
"Criminals."
Serial killer conspiracy theories took over
The speculations were endless
"The fact that the three bodies were all discarded of in the same way proves that the criminals behind these crimes belong to the same network and share the same goal."
"Will this end or continue?"
Many called on authorities to take immediate action in all the recent cases
"I hope our army forms teams to urgently deal with these serial crimes."
Illegal expats are particularly vulnerable as they are not officially registered in the kingdom
Expats who enter the kingdom illegally often land in trouble because they're forced to work in professions that aren't governed by the kingdom's laws.
This is one of the reasons local authorities have attempted to reduce the number of people illegally living in Saudi Arabia.
In 2017, the country launched "A Nation Without Violators," a campaign that gave residency and labor law violators the chance to leave the country without having to pay penalties.
Under the campaign, which took effect in March 2017, Saudi Arabia's former Interior Minister, Mohammad Bin Nayef, announced a three-month grace period to help undocumented expatriates regularize their status or leave the country.
Over 600,000 expat workers were said to have left the kingdom during the campaign.