Twitter has reported lower than expected revenue for the first three months of the year, saying that new products sold less well than forecast.
The micro blogging firm warned that it expected the negative impact on its revenue to continue for the rest of the financial year.
"It is still early days for these products," said Twitter chief executive Dick Costolo.
The firm reported revenues of $436m, up 74% year-on-year, but below forecasts.
It also reported a net loss of $162m, an increase from the same period a year ago when it lost $132.4m.
However, monthly users of the service increased 18% year-on-year, totalling 302 million for the first quarter.