BARCELONA, April 3 -- A flotilla of pro-Palestinian activists who attempted to reach Gaza last year said yesterday they would launch a new mission to the devastated territory from Barcelona on April 12.

The Global Sumud Flotilla's first weeks-long journey across the Mediterranean Sea to Gaza, blockaded by Israel during the war against Palestinian militant group Hamas, drew worldwide attention.

Israel's interception of their boats and arrests of the activists as they approached Gaza, which suffered severe shortages of food, water, medicine and fuel, sparked international condemnation.

The group, which described its first attempt as a humanitarian mission, said the latest trip starting in Spain's second city would gather more than 80 boa...