The United Arab Emirates is one of four Arab countries including Saudi Arabia, Bahrain and Egypt that have imposed travel, diplomatic and trade sanctions on Qatar, accusing Doha of supporting terrorism.
The Abu Dhabi-based official described on Twitter the Qatar's claim as "confusing", adding the UAE's authorities are working to respond to it officially with evidence.
Qatar has filed a complaint to the United Nations (UN) about an alleged violation of its airspace in December by an Emirati military aircraft, state news agency QNA reported, according to Reuters.
"HE Sheikha Alia (Ahmed bin Saif Al -Than) confirmed that the UAE plane entered the airspace of the State of Qatar without prior knowledge or approval of the competent Qatari authorities", the ambassador said as quoted by QNA, adding that "the incident was a flagrant violation of the sovereignty and territorial integrity of the State of Qatar, as well as a flagrant violation of the provisions of worldwide law, conventions, charters and global norms". "We see this as an escalation and (it) is unjustified, and what used to happen behind the scenes is now uncovered". "What has been happening under the table is now taking place in the open", the minister said.
They have banned all flights to and from Doha and cut off most trade links.