Officers were pursuing a stolen car in Brierley Hill on Friday afternoon, which ended up with a chase on foot.
They arrested a 16-year-old on Mill Race Lane at about 2.20pm, on suspicion of possession with intent to supply.
They also discovered "a large amount of cash and drugs."
The boy remains in police custody.
C unit Brierley Hill continuing the fight against #countylines drug dealing today. We pursued this stolen car in #brierleyhill. After a foot chase we have 1 male in custody on suspicion of possession with intent to supply. We have also recovered a large amount of cash and drugs. pic.twitter.com/84FmgN8NtT— Force Response - #StayAlert (@ResponseWMP) October 18, 2019