AUSTIN (KXAN) -- All southbound lanes are closed on Interstate 35 in north Austin after a crash involving a semi-truck Friday, the Austin Police Department said on social media Friday. Officers responded to North I-35 southbound and West Parmer Lane for the crash. APD said metal poles being carried by the truck were "scattered on the road." Police said to expect traffic delays along I-35. Drivers should seek alternate routes, if possible. This is a developing story. Check back for updates.