Guards thought there was something suspicious about a little white cat slipping through a prison gate in north-eastern Brazil.
A prison official said that when they caught the animal, they found a mobile phone, drills, small saws and other contraband taped to its body.
Alagoas state prisons spokeswoman Cinthya Moreno said the cat was caught at the medium-security prison in the city of Arapiraca.
The O Estado de S Paulo newspaper reported that all of the prison's 263 inmates are suspects in the smuggling attempt.
A prison spokesman said: "It will be hard to discover who is responsible since the cat does not speak."