Investigators believe the group was responsible for at least 64 migrant smuggling operations in which more than 2,000 people were brought to Spain, generating profits of more than €24 million. Spanish police said Friday they had dismantled what they called one of the largest criminal networks involved in smuggling migrants across the Mediterranean, arresting 78 people and seizing 18 high-speed boats. Key points and original sources are listed below.

• Investigators believe the group was responsible for at least 64 migrant smuggling operations in which more than 2,000 people were brought to Spain, generating profits of more than €24 million.S1

• Spanish police said Friday they had dismantled what they called one of the largest criminal networks involved in smuggling migrants across the Mediterranean, arresting 78 people and seizing 18 high-speed boats.S2