Mexico has announced a series of major drug discoveries in recent weeks in an apparent attempt to highlight increased efforts to combat drug smuggling.
The CIA has been flying MQ9 Reaper drones over Mexico to help sniff out dangerous cartels and fentanyl laboratories, in partnership with the country's government.
Trump's tariffs on Mexico and Canada, aimed at curbing fentanyl flow, may worsen the crisis by spiking overdoses, a harm reduction advocate warns.
The other side of the border has been beefed up too. The US Department of Defence has ordered 1,500 additional active-duty troops there to tackle the national emergency declared by Mr Trump. Airborne surveillance has been ramped up to monitor Mexican gangs.
Mexico's president said Monday she was optimistic about reaching an agreement with Donald Trump this week to avoid sweeping US tariffs, hinting at possible levies