State troopers ordered by Gov. Greg Abbott to inspect every commercial truck coming from Mexico earlier this month — which clogged international trade with Mexico — found zero drugs, weapons or any other type of contraband, according to data released by the Department of Public Safety to The Texas Tribune.

Earlier this month, Abbott ordered troopers to thoroughly inspect every commercial truck coming from Mexico’s four border states in what he described as an effort to stop illegal drugs and migrants from being smuggled into Texas. His order for increased state inspections was part of his response to the Biden administration’s announcement that it will lift Title 42 — the pandemic-era health order used by federal immigration officials to expel migrants, including asylum-seekers, at the U.S.-Mexico border. The expiration of the order is expected to increase the number of migrants seeking entry to the U.S.

Over eight days, starting April 8, troopers conducted more than 4,100 inspections of trucks. Troopers didn’t find any contraband but took 850 trucks off the road for various violations related to their equipment. Other truckers were given warnings, and at least 345 were cited for things such as underinflated tires, broken turn signals and oil leaks.

DPS Director Steve McCraw said at a Friday news conference with Abbott that the reason troopers hadn’t found any drugs or migrants in commercial trucks is because drug cartels “don’t like troopers stopping them, certainly north of the border, and they certainly don’t like 100% inspections of commercial vehicles on the bridges. And once that started, we’ve seen a decreased amount of trafficking across bridges — common sense.”