1.   Extradition requests are a frequent source of tension between the United States and Mexico, especially when they involve suspected Mexican drug traffickers.

2.   Hijackings, often involving drug traffickers, are not uncommon in the Amazon.

3.   Samper also called for closer cooperation among national judiciaries to exchange evidence and court records in cases involving drug traffickers.

4.   The courts have recently removed some judges accused of taking bribes in cases involving drug traffickers, but dirty-dealing persists.

5.   Police said there had already been clashes in the hostel involving cigarette traffickers.

6.   The network was based in the central Bulgarian town of Plovdiv and involved traffickers from Bulgaria and Tanzania, the police said.