By Josie Cox 

The Russian ruble hit a fresh record low against the U.S. dollar on Monday, burned by continuing fighting in Ukraine over the weekend and European Commission President José Manuel Barroso warning that the situation was approaching "a point of no return."

The dollar rose by 0.7% to 37.33 against the ruble in early trade, surpassing the previous record set Friday. Moscow's Micex equity index clung to a slim gain of 0.2%, while the dollar-traded RTS index lost 0.5%. Since last Monday, the former is down just over 3.5%, while the latter has declined by around 6.6%.

On Sunday, Ukrainian government forces lost more ground to Russian-backed separatists in heavy fighting in the east of the country. While on Saturday, European leaders threatened to impose more sanctions on Moscow if it doesn't end its support for the rebels.

Economists at Barclays PLC said that they expected a new set of sanctions in the coming week, but warned that this "could trigger more retaliation measures by Russia."

After suffering a sell off late last week, which strategists attributed to geopolitical tensions, European stock markets were steady, with investors hesitant to take major positions before key macroeconomic data.

The Stoxx Europe 600 was up nearly 0.2%, with major indexes in the U.K, Germany and France all moderately lower.

Earlier in the session, Swedish PMI came in at 51.0 for August, compared with a July reading of 55.2, sending the krona to a three-week low against the euro and a 14-month low against the Norwegian krone.

The euro continued its slow slide against the greenback, touching a near-year low of $1.3119 before rate announcements from both the European Central Bank and the Bank of England later in the week.

Several banks, including BNP Paribas, RBC and Nomura, expect the ECB to trim interest rates in a further bid to fuel the sluggish recovery.

Last month, ECB President Mario Draghi hinted that the central bank could be preparing further stimulus, even raising the prospect of quantitative easing. Some economists have said, however, that the central bank is likely to want to gauge the impact of its June measures and assess the take up of the targeted longer-term refinancing operation before taking further action.

Back in equity markets Swiss drug maker Novartis AG led the pan-European index, adding almost 3% after a positive testing of its LCZ696 heart drug. Fabian Wenner, an analyst at KeplerCheuvreux, raised his target price to 87 Swiss francs from 81 francs.

France's Iliad SA, which is trying to buy U.S. operator T-Mobile, was the biggest loser on the index after the telecom operator reported a fall in first-half net profit on Friday.

In commodities markets Brent crude oil lost 0.3% to trade at $102.89 a barrel, while gold added 0.1% to $1,289.20.

Write to Josie Cox at josie.cox@wsj.com

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