Bad news for Nelly ...
the rapper was busted in Missouri ...
and cops say illicit drugs are involved. Nelly was arrested early Wednesday morning for a couple offenses ..
. possession of four ecstasy pills and not having insurance ..
. according to online arrest records. The "Hot In Herre" rapper was busted after being pulled over in Maryland Heights .
.. a suburb outside St.
Louis, Nelly's hometown. Nelly -- government name Cornell Haynes II -- was taken into custody at 4:45 AM Wednesday and booked at the Maryland Heights Police Department. He's since been released.
TMZ obtained Nelly's mug shot ...
and his eyes appear bloodshot and he's mostly expressionless in a black hoodie, white undershirt and some bling. KRCG news in Missouri was first to report Nelly's arrest. We reached out to Nelly's camp, as well as police .
.. so far no word back.
Story developing ...
.