TEHRAN, Jan. 21 (Xinhua) -- Western countries involved in the ongoing Vienna nuclear negotiations on Thursday continued to create a sense of urgency by highlighting again that it was now just a matter of weeks to revive the 2015 Iranian nuclear pact, despite Iran's repeated rejection of such "constructed deadlines."

The months-long diplomatic endeavors in the Austrian capital have yet to find a way to break the impasse between Washington and Tehran, which have negotiated indirectly through the mediation of the European Union.

Although there has been no deadline formally set for the end of the talks, it seems that unless the challenges are dealt with fairly, the negotiation may lead to a more complicated and trickier situation.

"DECISIVE MOMENT"

"There is real urgency and it's really now a matter of weeks, where we determine whether or not we can return to mutual compliance with the agreement," U.S. Secretary of State Antony Blinken told a news conference on Thursday after meeting British, French and German ministers in Berlin.

"We are indeed at a decisive moment," he noted.

Also, French Foreign Minister Jean-Yves Le Drian said earlier that the negotiations on the fate of the 2015 nuclear deal, formally known as the Joint Comprehensive Plan of Action (JCPOA), "are underway but from our point of view they are slow, too slow."

"There is a vital urgency on this issue because of Iran's own actions and the trajectory of its nuclear program," he told the French parliament last week.

Meanwhile, the eighth round of negotiations has entered "a critical and relatively decisive stage," the outcome of which can have a significant impact on the outcome of the negotiations, Nour News, a media outlet close to Iran's Supreme National Security Council, said recently.

An examination of the current process in the negotiations reveals the fact that in less complex issues of dispute, progress has accelerated, but disagreement on more difficult areas remains, according to Nour News, which suggested the parties involved "come to the talks with more initiative and authority to pass this stage."

"MEDIA GAMES"

Making media literature on "time constraints" and repeating the threat of "taking advantage of other options" if diplomacy fails is an "old and inefficient tool the Western side of negotiations still insists on using," Nour News said, in an apparent reference to the warning by the Western parties to the deal that "window for diplomacy is closing."

There is no need to repeat "fruitless media games," if the West, especially the United States, prefers "the need for wise decision-making over politicking and extravagance," it added.

"Iran has done everything in its power to constructively engage in the talks. It has actively contributed to the progress of the talks through drafting and presenting innovative proposals," Tehran Times said recently.

"The slow pace of Vienna talks is due to Western obstinacy," it added.

In an interview with Xinhua on Tuesday, Iranian Foreign Ministry Spokesman Saeed Khatibzadeh said negotiators in Vienna "are not advancing a lot" on the sanctions-lifting aspect of the deal, because "Americans are yet to make the needed political decisions in their capital."

"BEHAVIORAL CONTRADICTION"

Amir Ali Abolfath, an Iranian international affairs analyst, wrote in Arman Melli newspaper about the "behavioral contradiction of the Americans" in the ongoing nuclear talks in Vienna.

"On the one hand, the Americans are asking for the progress of negotiations, and on the other hand, they are not taking any practical steps to revive the agreement," he said.

If the current U.S. government is critical of the behavior of the previous government and considers leaving the JCPOA "a big mistake", it should take an effective step to solve the problem, Abolfath concluded.

Likewise, Soheil Sabet, a political expert, wrote in a note in Arman Melli that the time for the Western parties has arrived to show their real willingness to reach an agreement by taking "meaningful and action-oriented" steps.

According to the Wall Street Journal on Monday, Western diplomats have warned that the biggest obstacles to the Vienna talks on salvaging the JCPOA is Iran's request for a legal guarantee that the United States would not re-withdraw from a possible deal and re-impose sanctions on the Islamic republic.