A botched oil delivery spilled heaps of fuel across a block of Manhattan’s First Avenue on Monday, forcing emergency crews to direct traffic around the scene in a move that worsened gridlock caused by the ongoing United Nations General Assembly on the East Side.

Firefighters and hazmat crews responded to the spill near East 30th Street around 11:45 a.m., according to a fire department spokesperson. A truck owned by the company, Approved Oil, had a hose connected to a building on the block before its haul spilled all over the roadway, bystanders said.

City officials said the official cause of the incident remained under investigation. Frank Millo, who was on the block when oil from the truck started spewing all over the pavement, said a man riding an electric bicycle ran into the hose,

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