MANILA, Philippines -- Senator Panfilo Lacson has disowned yellow T-shirts reportedly being distributed in Mandaluyong City in time for a rally against Charter change in Makati City on Friday.

Lacson branded the distribution of the shirts, which have the image of a clenched fist -- his campaign logo in 2004 -- as a possible attempt to sabotage the protest.

"While I am attending the anti-Chacha [Charter change] rally on Friday, I have not imposed a supposed dress code on my supporters, much less wear such shirts," he said in a statement on Tuesday.

The distribution of the shirts at Addition Hills Village in Mandaluyong City, he said, was probably part of a plan to disrupt the rally and pin the blame on him.

"Those wearing the shirts may make trouble during a protest action so I will be blamed as a destabilizer,? he said.