BEFORE prie-trial investigation: Operational surveillance- a method of operational activity, when information is obtained secretly and the object is observed directly.DURING the prie-trial investigation: the prie-trial judge, upon the prosecutor's request, may order the observation of a person or a motor vehicle. In urgent cases, these actions may be conducted based on the prosecutor's or pre-trail inevistagator's decision. In such a case a pre-trail investigation judge's sanction for these actions must be received within 3 days. If such a sanction is not received, the observation must be terminated adn the data received immediaely destroyed.
The officers from abroad, who are conducting the investigation, are allowed to participate in observation, however, the consent (on allowing them to participate in the pre-trial investigation actions) of the Prosecutor General’s Office of the Republic of Lithuania should be obtained beforehand.