On April 6 Cronstedt agreed with Jan Pieter van Suchtelen, the Russian commander in Helsinki, on an honorable capitulation on May 3 if Swedish reinforcements didn't reach Sveaborg by then. The Swedish couriers bearing the requests for reinforcements were delayed by the Russians and didn't reach Stockholm until May 3, the same day Cronstedt capitulated and surrendered the fortress to the Russians, along with 7,500 soldiers and a fleet of 94 ships. Even if the couriers had arrived earlier, Sveaborg probably could not have been relieved by the fleet, as the winter was unusually cold and the Baltic sea was still partially frozen at the time. The fortress lost 6 men dead and 32 wounded as well as a couple of broken roofs and windows as the result of Russian actions in the siege.