European markets fell Monday as investors remained concerned about the debt crisis lingering over the euro zone.

The German DAX 30 index fell 1.16 percent or 72.51 points to 6190.74. Shares of Deutsche Bank AG declined 1.54 percent and shares of Siemens AG fell 1.37 percent.

The French CAC 40 index fell 0.85 percent or 26.39 points to 3064.51. Shares of Carrefour SA declined 1.91 percent and those of Peugeot SA fell 1.27 percent.

London's FTSE 100 index declined 0.36 percent or 19.87 points to 5493.82. Shares of BT Group PLC fell 1.07 percent and those of Unilever PLC declined 0.76 percent.

Spain's IBEX 35 fell 0.94 percent or 64.90 points to 6811.40. Shares of Abengoa SA declined 2.48 percent and shares of Iberdrola SA fell 1.13 percent.

Though investors are expecting a credible set of solutions to the euro zone crisis, various summits and official meetings, including the G20 meeting, have failed to deliver anything of this nature do far.

Investors are focusing on the European summit in Brussels June 28 and 29, and markets are clearly looking for the EU to lay out a clear roadmap for a political, fiscal and banking union. Various issues ranging from debt mutualization to fiscal and banking union as well as a potential renegotiation of Greece's bailout terms will be discussed in the summit.

Importantly, investors feel that an agreement should be found on growth-enhancing measures. At the very least, elements of a growth strategy to accompany the fiscal pact are expected to be outlined, and movement towards a debt redemption fund is also hoped for, Markit Economics said in a note.