A group of Irish activists deported from Israel after their Gaza-bound aid ship was blocked from delivering humanitarian supplies vowed to continue their activities Monday.

Speaking at Dublin airport on her return, Nobel peace prize-winner Mairead Maguire said efforts to end the blockade must now be stepped up.

"We would go back, of course - the international community, we all have a role to play to tell this story," she said.

The aid ship, the Rachel Corrie, was seized Saturday by the Israeli navy and its crew members were deported.

"President Obama has the power to say to the Israeli government enough is enough, your policy is not acceptable and you must choose peace," Maguire said.

The seizure, carried out with the full compliance of the ship's crew and passengers, was in stark contrast to the violent confrontation a week ago in which nine pro-Palestinian campaigners were killed.

Meanwhile, activists said another aid flotilla could be making its way to Gaza within weeks.

"We are in the planning stages of the Freedom Flotilla Two - we think it will be ready in about six to eight weeks," said Rory Byrne of the European Campaign to End the Siege on Gaza umbrella group.

"We expect it to be a lot bigger than the last one," he said.

Derek and Jenny Graham, Fiona Thompson, Denis Halliday and Mairead Maguire arrive at Dublin airport