Popular micro-blogging service Twitter has received a round of venture capital financing, reports TechCrunch.

The financing round, the amount of which was not disclosed, was led by Union Square Ventures and included a number of others. Sources were vague as to how much was raised, but narrowed the ballpark figure to between $1 million and $5 million.

Twitter experienced solid growth in recent months and has become the subject of an increasing amount of marketer interest.