Earlier this week U.S. authorities announced the discovery of a “fully operational” and “sophisticated” tunnel under the U.S.-Mexico border, reaching from Tijuana to San Diego.

Authorities confirmed 1,700-foot tunnel that ends in a San Diego warehouse near the U.S. Border Protection Otay Mesa Port of Entry was used to traffic drugs.

U.S. Attorney for the Southern District of California Randy Grossman said the 61-foot deep and four feet across at the widest part was complete with “reinforced walls, a rail system, and electricity for ventilation.”

A 1,744 foot drug smuggling tunnel 61 feet underneath Trump’s border wall is discovered between Tijuana Mexico and Otay Mesa, south of San Diego. It has reinforced walls, a rail system, electricity, and a ventilation system. pic.twitter.com/O2KXREUJh6

— Mike Sington (@MikeSington) May 17, 2022

Authorities stated a whopping $25 million worth of drugs were seized form within the tunnel over the weekend. Fox News reports that among the drugs were “1,762 pounds of cocaine, 165 pounds of meth, and 3.5 pounds of heroin.”

Authorities found the tunnel after surveilling a truck that was going to and from the warehouse with large boxes. “In a span of a few hours, agents watched five vehicles come and go from the stash house and this warehouse, we allege that the defendants were driving into the garage and loading or dropping off cardboard boxes full of drugs to further the movement or distribution of drugs throughout the United States, the federal agents were watching the whole time,” Grossman said.

After raiding the warehouse, authorities found no other drugs, but did spot the tunnel opening carved onto the floor.

“There is no more light at the end of this narco-tunnel,” Grossman said. “We will take down every subterranean smuggling route we find to keep illicit drugs from reaching our streets and destroying our families and communities.”

Fox News reports six California residents, aged 21 to 55, were arrested and charged with conspiring to distribute cocaine, meth, and heroin. “Together with the Mexican government, we have been collaborating in trying to eradicate these tunnels, which should not exist because that is where a lot of crime happens, and a lot of the suffering that we see,” U.S. Ambassador to Mexico Ken Salazar told the news outlet Zeta. “This needs to stop.”

Fox News adds “authorities said that drug-smuggling tunnels are not uncommon. They are usually used by drug smugglers to evade authorities and transport a large quantity of drugs. More than 15 tunnels have been found since 2006, officials said.”