Unable to import tensorflow, importerror libcublas : Hello I am new to tensorflow.

I installed tensorflow-gpu. I am using the virtualenv installation for Tensorflow. 

    Ubuntu version 16.04
    Cuda compilation tools, release 7.5, V7.5.17
    Nvidia Driver:390 (latest)

I have already linked cuda to my .bashrc:

    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/cuda-9.1/extras/CUPTI/lib64


When I try:

    import tensorflow as tf

I receive the following error:

    >>> import tensorflow
    Traceback (most recent call last):
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/pywrap_tensorflow.py", line 58, in <module>
        from tensorflow.python.pywrap_tensorflow_internal import *
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/pywrap_tensorflow_internal.py", line 28, in <module>
        _pywrap_tensorflow_internal = swig_import_helper()
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/pywrap_tensorflow_internal.py", line 24, in swig_import_helper
        _mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, description)
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/imp.py", line 242, in load_module
        return load_dynamic(name, filename, file)
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/imp.py", line 342, in load_dynamic
        return _load(spec)
    ImportError: libcublas.so.8.0: cannot open shared object file: No such file or directory
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/__init__.py", line 24, in <module>
        from tensorflow.python import *
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/__init__.py", line 49, in <module>
        from tensorflow.python import pywrap_tensorflow
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/pywrap_tensorflow.py", line 72, in <module>
        raise ImportError(msg)
    ImportError: Traceback (most recent call last):
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/pywrap_tensorflow.py", line 58, in <module>
        from tensorflow.python.pywrap_tensorflow_internal import *
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/pywrap_tensorflow_internal.py", line 28, in <module>
        _pywrap_tensorflow_internal = swig_import_helper()
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/site-packages/tensorflow/python/pywrap_tensorflow_internal.py", line 24, in swig_import_helper
        _mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, description)
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/imp.py", line 242, in load_module
        return load_dynamic(name, filename, file)
      File "/home/rosi/udacity/TensorFlow/lib/python3.5/imp.py", line 342, in load_dynamic
        return _load(spec)
    ImportError: libcublas.so.8.0: cannot open shared object file: No such file or directory
    
    
    Failed to load the native TensorFlow runtime.


Kindly suggest how to fix this issue. 