(CNN) Maria Ressa, a high-profile Philippine journalist and vocal critic of President Rodrigo Duterte, was arrested -- once again -- after being detained at Manila airport Friday.

Ressa, a Time Magazine Person of the Year in 2018, told CNN she was taken into custody shortly after stepping off a plane from San Francisco.

The CEO of upstart media company Rappler was later charged with violating the anti-dummy law, legislation related to securities fraud.

She posted bail Friday afternoon, the seventh time that the beleaguered, award-winning journalist has been forced to do so in recent months. She had to post bail twice Friday -- once in the sum of 90,000 Philippine pesos ($1,709) and a further 128,000 Philippine pesos ($2,430) in bail for charges brought at another court.

Rights groups have long alleged that Ressa is being targeted by the authorities as part of a campaign to silence and intimidate Rappler, which has reported extensively on Duterte's war on drugs that has killed thousands.

Read More