Brent fell 0.7% to $100.53/barrel, after earlier low $96.10, as markets await Iran's response to US peace proposal.
Iran is reviewing a fresh US proposal, with response expected by Thursday, while new Hormuz transit rules require a Vessel Information Declaration.
Shell reported Q1 profit of $6.92 bn, up over double YoY, raising dividend 5% and cutting buyback to $3 bn, shares fell ~3%.