The pair, both 19, were arrested yesterday.
“They currently remain at an east London police station assisting police with their enquiries,” said Havering Police in a statement.
The victim, also 19, was rushed to hospital after being attacked in Atlanta Boulevard at around 1.20pm yesterday.
An air ambulance was also called and landed near the Lidl car park.
The victim has since been discharged.
Tags: Romford, Havering