Money and ammunition have been stolen from Tasmania Zoo at Riverside.
Police say the break-in occurred between 4am and 6am today, with the offenders cutting the fence of the zoo to get in.
They then broke into the ATM, taking cash and destroying the machine.
Firearm parts and ammunition were also taken.
The Launceston CIB is investigating the robbery and would like to hear from anyone who saw vehicles or people acting suspiciously near Tasmania Zoo or Ecclestone Road this morning.
Information can be reported to Launceston CIB on 6336 3910 or Crime Stoppers on 1800 333 000.