Allegedly some arrests of armed rivals of PYD recently. I haven't seen any official statements of the PYD yet on this subject. Apart, from PYD-leader Salih Muslim saying they will launch a court case against the Azadi party for shedding Kurdish people's blood.
In Kobani there was a protest on 17 May calling for release of Sarwar Aladdin Bath, who was arrested some time ago. Moreover, a pro-KNC demonstration also called for release of KNC supporters.

PYD officials confirm to media outlets that they have the right to question everyone & that "Asayish &YPG" are the only legal armed forces.
— TCK-English (@youthkurd) May 18, 2013
One more Kurdish activist; Kadshin Serac a member of Shex Meshuq battalion was detained yesterday by PYD in Qamishlo yekiti-media.org/nuce.php?z=ar&…
— TCK-English (@youthkurd) May 18, 2013
The ongoing detaining operations by the PYD against their opponents caused outrage among KNC supporters. |Photo facebook.com/photo.php?fbid…
— TCK-English (@youthkurd) May 18, 2013
Serdar Qeri, Kurdish language teacher; detained by PYD forces in May 13, 2013. According to Yekiti he is accused of forming an armed group.
— TCK-English (@youthkurd) May 18, 2013
Several Kurdish activists have been detained by PYD forces in the past few days. #Syria
— TCK-English (@youthkurd) May 18, 2013
Yekiti member about the issue:
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