A lane is blocked on I-75 in Hillsborough County after part of a semi-truck fell over the side on Monday.The crash occurred around 12 p.m. on the I-75 north ramp to I-4. Officials said the off-ramp left lane is currently blocked.There are no further details at this time about the crash, but officials said there are injuries.This is a developing story and will be updated when more information is available.