They haven’t informed the PM, leader of the House Lakshman Kiriella or party general secretary Kabir Hashim about their visit in advance.
These UNP ministers and MPs have disregarded a directive by the office of the leader of the House to attend parliamentary sessions without fail.
The government had wanted to get an urgent finance act adopted, and the order was given in view of possible disruptions by the joint opposition.
The PM has instructed Kiriella to submit a list of the UNP politicians in the US with the president.
The foreign affairs ministry too, has been instructed to furnish a report immediately with regard to the diplomatic duties carried out by them while overseas.