Uh oh.

An “undetermined amount of explosives” was reported missing from Texas-based oil company Halliburton on Thursday, Odessa police said.

The explosives disappeared en route from a Halliburton yard in Odessa to Reeves County in western Texas, police said. The call about the explosives came in around 6 a.m. Thursday, but Halliburton later said the loss was noticed on Wednesday.

Police described the explosives as “oilfield igniters,” about two inches long and half an inch wide, with no labels on them to indicate that they are dangerous. They cause small explosions to fuel much larger ones. Basically, it's a 'trigger.'

The explosives disappeared while being transported away from this company yard in Odessa.

A release from the Odessa Police Department advises anyone who encounters the explosives to “use caution and report them immediately to police.”

Halliburton said in a statement to the Daily News that it's “conducting a thorough search” for the lost load.

Halliburton lost a radioactive rod while transporting it away from a Reeves County well in 2012 and later found it on a road seven miles from the well, the Odessa American reported.

This is at least the second time in three years that a dangerous Halliburton device went missing while being transported.