Texas prison officials are scurrying to find a supplier to replenish a dwindling inventory of execution drugs.

Their search is taking place amid a pending court order that would no longer allow the state to protect the supplier's identity.

The nation's most active death penalty state has enough pentobarbital for executions scheduled this week and next week. But prison officials don't yet know about lethal injections of four others scheduled for April.

Texas Department of Criminal Justice Executive Director Brad Livingston says it's a challenge facing not only his agency but prison departments nationwide.

Texas officials have cited security concerns for withholding the name of its execution drug supplier. A judge in Austin last year ordered the name disclosed, but state attorneys are appealing that ruling in the courts.